David Edward Mahon's research primarily revolves around high-energy particle collisions, particularly examining various particles produced during these interactions. For example, he investigates how particles like mesons and baryons behave under extreme conditions often found in nuclear physics experiments. His work includes studying the behavior of charged particles during high-energy collisions of elements like oxygen and lead, which helps physicists understand the fundamental properties of matter. He also explores how certain particles are produced, what their internal structures are, and how they interact with one another, enriching our knowledge of the forces at play in the universe.
Key findings
In oxygen-oxygen collisions, particle production was suppressed with a nuclear modification factor (R_{AA}) of 0.69, indicating less production than expected.
The observation of D^0 mesons during heavy ion collisions provided crucial insights into the internal structure of lead nuclei at various energy levels.
In measuring tWZ production, rates of top quark detection were found to be 248 and 242 for every billion proton collisions at two energy levels.
The mass differences of B mesons were measured with high precision, with B^{*+} being about 45.3 MeV heavier than B^{+}, contributing enhanced knowledge of particle interactions.
A limit was established that the rare D^{0}→μ^{+}μ^{-} decay occurs less than 2.4 times in one billion attempts, informing future research on particle decay rates.
Frequently asked questions
Does Dr. Mahon study specific diseases or conditions?
Dr. Mahon focuses on particle physics and nuclear interactions, rather than specific medical diseases or conditions.
What treatments has Dr. Mahon researched?
Dr. Mahon's research does not involve treatments; instead, he studies fundamental particles and their interactions through high-energy collisions.
Is Dr. Mahon's work relevant to understanding how the universe works?
Yes, his work provides valuable insights into the fundamental forces of nature and particle behaviors, contributing to our understanding of the universe.
Who benefits from Dr. Mahon's research?
Physicists and researchers in particle physics and nuclear interactions benefit greatly from his findings.
What types of experiments are conducted in Dr. Mahon's studies?
Dr. Mahon's studies involve high-energy collisions of atoms, using particle detectors to observe and measure various particle behaviors.
Publications in plain English
Implementation of Online Mindfulness With Peer Mentoring for Parent and Sibling Carers of People With Intellectual and Developmental Disabilities.
2026
Journal of intellectual disability research : JIDR
Murray CA, Hayden NK, Gordon-Brown A, Flynn S, Bonetree C +5 more
Plain English This study looked at how online mindfulness training combined with support from peers could help family members who care for individuals with intellectual and developmental disabilities. Out of 101 participants, 37 completed the program, and those who did reported improvements in their mental well-being over time, especially if they had received all three peer support calls. This is important because it shows that such programs can benefit caregivers, who often experience high levels of stress, but more research is needed to see how to effectively implement them on a larger scale.
Who this helps: This helps family caregivers, including parents and adult siblings, of people with intellectual and developmental disabilities.
"You Don't Feel as Embarrassed Looking at Them". Peer Mentoring on an Integrated Fitness and Educational Substance Use Program.
2026
Substance use & misuse
Mahon D
Plain English This study looked at how peer mentors support people in a combined fitness and educational program for those dealing with substance use issues, called Boxing Clever. Researchers found that the peer mentors helped participants feel more comfortable and hopeful, which improved their engagement in the program. Specifically, the study highlighted that 32 participants valued mentors for their informal support and identified personal growth opportunities from this relationship, despite some challenges.
Who this helps: This benefits individuals recovering from substance use, as well as the peer mentors themselves.
Observation of Suppressed Charged-Particle Production in Ultrarelativistic Oxygen-Oxygen Collisions.
2026
Physical review letters
Hayrapetyan A, Makarenko V, Tumasyan A, Adam W, Benato L +2409 more
Plain English This study looked at what happens when oxygen nuclei collide at ultra-high speeds and how it relates to a state of matter called quark-gluon plasma. Researchers found that the production of certain particles is reduced in these collisions, with a significant suppression measured at a level of 0.69 when looking at particles with high energy. This is important because it helps us understand how particles lose energy in dense nuclear matter, contributing to our knowledge of fundamental physics and the conditions that existed shortly after the Big Bang.
Who this helps: This helps physicists studying the early universe and the fundamental forces of nature.
Measurement of D^{0} Meson Photoproduction in Ultraperipheral Heavy Ion Collisions.
2026
Physical review letters
Chekhovsky V, Hayrapetyan A, Makarenko V, Tumasyan A, Adam W +2409 more
Plain English This study looked at how a specific particle, called the D^0 meson, is produced when heavy lead nuclei collide in a very specific way. Researchers found that they could measure these particles through certain events where one of the nuclei breaks apart while the other remains intact, and this was achieved using data from high-energy lead-lead collisions. Their findings help improve our understanding of how particles behave at a nuclear level, particularly in terms of the distribution of their constituent parts, showing important data about partons within lead nuclei.
Who this helps: This helps physicists and researchers in particle physics who are studying nuclear interactions and fundamental particles.
Simultaneous Probe of the Charm and Bottom Quark Yukawa Couplings Using tt[over ¯]H Events.
2026
Physical review letters
Hayrapetyan A, Makarenko V, Tumasyan A, Adam W, Andrejkovic JW +2421 more
Plain English Researchers studied how the Higgs boson behaves when it decays into pairs of charm quarks and is produced alongside top quarks. They found that the rate of this occurrence is slightly lower than what the standard model predicts, with numbers showing an observed event rate of 0.91, and the charm-quark interactions better constrained at less than 3.5 times the standard model expectation. This matters because it helps scientists understand the fundamental properties of particles and how they interact, which is key for advancing physics knowledge.
Who this helps: This research benefits physicists and researchers working on particle physics and the standard model.
First Exclusive Reconstruction of the B^{*+}, B^{*0}, and B_{s}^{*0} Mesons and Precise Measurement of Their Masses.
2026
Physical review letters
Hayrapetyan A, Makarenko V, Tumasyan A, Adam W, Andrejkovic JW +2417 more
Plain English This study focused on analyzing three specific types of particles called B mesons: B^{*+}, B^{*0}, and B_{s}^{*0}. Researchers found the mass differences between these excited mesons and their normal counterparts to be very precise: 45.277 MeV for B^{*+}, 45.471 MeV for B^{*0}, and 49.407 MeV for B_{s}^{*0}. These findings are notable because they enhance the accuracy of our understanding of these particles by a factor of ten compared to earlier measurements.
Who this helps: This helps physicists studying particle interactions and the fundamental forces in nature.
Observation of tWZ Production at the CMS Experiment.
2026
Physical review letters
Hayrapetyan A, Makarenko V, Tumasyan A, Adam W, Andrejkovic JW +2419 more
Plain English The CMS particle detector at CERN observed, for the first time, a collision event in which a single top quark was produced alongside both a W and a Z boson simultaneously. The signal was confirmed with 5.8 standard deviations of statistical significance using 200 inverse femtobarns of data. This observation validates a predicted process in the Standard Model of particle physics and opens a new channel for probing fundamental interactions between quarks and force-carrying particles.
A Systematic Review of Trauma Informed Care in Substance Use Settings.
2025
Community mental health journal
Mahon D
Plain English This research reviewed how trauma-informed care programs in substance use treatment settings can help people who have experienced trauma. Out of 15 studies examined, the results showed that using trauma-informed approaches led to lower levels of substance use and improved mental health among participants, with six studies reporting high quality outcomes. This is important because it suggests that addressing trauma can make treatment more effective and improve patient satisfaction with care.
Who this helps: This benefits patients dealing with substance use issues, as well as the healthcare providers supporting them.
An international Delphi consensus on patient preparation for metabolic and bariatric surgery.
2025
Clinical obesity
Clyde DR, Adib R, Baig S, Bhasker AG, Byrne J +44 more
Plain English Researchers studied how to improve patient preparation for metabolic and bariatric surgery (MBS), which helps people with severe obesity lose weight and gain health benefits. They gathered opinions from 45 experts worldwide and reached an agreement on 90 out of 169 important recommendations about how to manage patients before and during their surgery. This new consensus aims to standardize practices across different countries, ensuring that patients receive better care and support, which can lead to improved surgery outcomes.
Who this helps: This benefits patients undergoing metabolic and bariatric surgery.
Barriers and Facilitators to Staff's Implementation of Behaviour Support Plans in Community Settings.
2025
Journal of applied research in intellectual disabilities : JARID
Mahon D, Dunworth C, McSharry J, Holloway J, Lydon H
Plain English This study looked at the challenges and supports that affect how staff use Behavior Support Plans (BSPs) in community settings for people with intellectual disabilities. Researchers found that communication among team members and how well the work environment fits the plans are key factors influencing successful use of BSPs. When these elements are in place, it helps staff apply what they've learned in training to improve skills and reduce challenging behaviors in individuals.
Who this helps: This benefits caretakers and staff working with individuals who have intellectual disabilities.
Prevention and Rehabilitation of the Athletic Hamstring Injury.
2025
Arthroscopy, sports medicine, and rehabilitation
Geraci A, Mahon D, Hu E, Cervantes JE, Nho SJ
Plain English This study focused on hamstring injuries, which are very common among athletes, especially professional baseball players due to their intense movements and running. The researchers found that a well-structured rehabilitation program can help athletes recover faster and reduce the time they spend sidelined. It's important because better recovery methods keep athletes in the game and can lead to improved performance.
Who this helps: This helps athletes, especially those in sports like baseball.
'You Understand Me': Experiences of Peer Mentors Delivering Support for a Mindfulness Intervention to Family Carers of People With Intellectual and Developmental Disabilities.
2025
Journal of applied research in intellectual disabilities : JARID
Gordon-Brown A, Murray CA, Hayden NK, Hastings RP, Mahon D +1 more
Plain English This study looked at the experiences of 10 peer mentors who supported family carers of individuals with intellectual and developmental disabilities while they participated in an online mindfulness program. The mentors reported feeling more confident and believing in themselves as a result of their roles, and they found personal and professional growth through their experiences. Understanding how peer support works is important as it can improve mental well-being for those caring for loved ones with disabilities.
Who this helps: This benefits family carers and peer mentors by enhancing their support systems and personal well-being.
State-of-the-art Neurointervention for Extended Window and Large Ischemic Core.
2025
Journal of intensive care medicine
Lee K, Mahon D
Plain English This paper discusses advances in a procedure called endovascular therapy, used to treat acute ischemic strokes. Early studies had mixed results, but the MR CLEAN trial showed that a specific procedure called thrombectomy can help patients, leading to expanded guidelines. This is important because it allows more patients, including those with larger areas of brain damage, to potentially receive life-saving treatment.
Who this helps: This helps patients suffering from acute ischemic strokes and their healthcare providers.
Search for New Resonances Decaying to Pairs of Merged Diphotons in Proton-Proton Collisions at sqrt[s]=13 TeV.
2025
Physical review letters
Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T +2341 more
Plain English This study looked for new particles that might exist alongside the Higgs boson by analyzing collisions of protons in a particle accelerator at a high energy level of 13 trillion electron volts. Researchers used advanced computer techniques to examine events where two gamma rays were produced together and found no signs of the predicted new particles. They were able to set limits on how often these particles could be produced, stating that for one of the particles, X, if it exists, its mass could range between 300 and 3000 GeV.
Who this helps: This research benefits physicists studying fundamental particles and their interactions.
Search for Nuclear Modifications of B^{+} Meson Production in p-Pb Collisions at sqrt[s_{NN}]=8.16 TeV.
2025
Physical review letters
Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T +2392 more
Plain English This study looked at how the production of B+ mesons, a type of particle, is affected when protons collide with lead atoms at high energy. Researchers found that the number of B+ mesons produced stayed consistent across different levels of charged particles, meaning there were no significant changes in their production related to nuclear effects. This consistency helps scientists understand the role of nuclear environments in particle production, which is important for studying the fundamental interactions of matter.
Who this helps: This benefits researchers in particle physics and helps advance our understanding of nuclear interactions.
Search for Fractionally Charged Particles in Proton-Proton Collisions at sqrt[s]=13 TeV.
2025
Physical review letters
Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T +2352 more
Plain English This study looked for rare particles that have charges less than a single electron charge in high-energy collisions between protons at a particle accelerator. Researchers analyzed data from over 138 million collisions and found no evidence of these fractionally charged particles, ruling out the existence of these particles with masses up to 640 billion electron volts and charges as low as one-third of an electron charge. This is important because finding such particles could change our understanding of fundamental physics.
Who this helps: This helps physicists and researchers in the field of particle physics.
Challenges of using and managing medication: a meta-ethnography of the experiences and perceptions of people with intellectual disability and people who support them.
2025
BMJ open
Ghosh I, Adams D, Auguste P, Brown A, Chaplin E +12 more
Plain English This research focused on the difficulties that people with intellectual disabilities, their caregivers, and health professionals face when it comes to using and managing medications. The study reviewed 45 papers and identified four key issues: problems with medications, the balance between autonomy and relationships, the need for better knowledge and training, and inequalities in healthcare. It highlighted that collaboration among all parties involved is essential to improve medication management, which can lead to better health outcomes for these individuals.
Who this helps: This benefits patients with intellectual disabilities and their caregivers.
Reweighting simulated events using machine-learning techniques in the CMS experiment.
2025
The European physical journal. C, Particles and fields
Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Benato L +2394 more
Plain English This study looked at how machine-learning techniques can improve the way particle collisions are simulated and analyzed at the Large Hadron Collider (LHC). The researchers found that using machine learning to adjust existing simulations allows them to create more accurate models without having to run multiple costly simulations. This method is especially useful for accurately modeling complex events, like the production of top quark pairs, and will help improve measurements in future experiments.
Who this helps: This benefits physicists and researchers working on particle physics experiments.
Global Variations in Practices after Bariatric and Metabolic Surgery; the PARTNER Study.
2025
Obesity surgery
Clyde D, Grant C, Canales JAA, Adib R, Baig S +53 more
Plain English The PARTNER study examined how different countries manage care for patients after weight loss surgery, known as metabolic and bariatric surgery (MBS), by surveying healthcare professionals. It found that while 79% of doctors conduct follow-ups three months after surgery, only 24% provide ongoing care afterward, with substantial differences in practices like dietary advice and psychological support. These variations highlight the need for consistent guidelines to ensure all patients receive the best possible care after surgery.
Who this helps: This benefits patients seeking weight loss surgery and their long-term health outcomes.
Search for a Neutral Gauge Boson with Nonuniversal Fermion Couplings in Vector Boson Fusion Processes in Proton-Proton Collisions at sqrt[s]=13 TeV.
2025
Physical review letters
Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Benato L +2391 more
Plain English This research looked for a heavy particle called the Z' boson, which may interact differently with other particles, specifically tau leptons and W bosons. Using data from particle collisions at the Large Hadron Collider, the researchers found no evidence of the Z' boson existing in mass ranges up to 2.45 TeV for tau decay and 1.60 TeV for W boson decay. This matters because it helps scientists refine their understanding of particle physics and the forces that govern how particles interact.
Who this helps: This helps researchers and physicists studying fundamental particles and forces.
Evidence for Similar Collectivity of High Transverse-Momentum Particles in p-Pb and Pb-Pb Collisions.
2025
Physical review letters
Chekhovsky V, Hayrapetyan A, Makarenko V, Tumasyan A, Adam W +2389 more
Plain English This study looked at how particles behave in two types of collisions: proton-lead (pPb) and lead-lead (PbPb). Researchers found that in both collisions, high-energy particles showed similar patterns of using a measurement called elliptic anisotropy, especially when they produced a lot of charged particles. Specifically, they observed significant positive values for this measurement when the transverse momentum (energy) was above 8 GeV, indicating that these similarities suggest something fundamental about how these particles interact.
Who this helps: This benefits physicists studying particle collisions and their fundamental properties.
Measurement of WWZ and ZH Production Cross Sections at sqrt[s]=13 and 13.6 TeV.
2025
Physical review letters
Hayrapetyan A, Makarenko V, Tumasyan A, Adam W, Andrejkovic JW +2437 more
Plain English This study looked at how often two W particles and one Z particle are produced when protons collide at high energies at the CERN facility. They found that the production rates were about 75% of what scientists expected at 13 TeV, and 174% at 13.6 TeV, marking the first time they've been able to measure these processes separately. This research is important because it provides new insights into how these fundamental particles interact, which can enhance our understanding of the universe.
Who this helps: This helps physicists and researchers studying particle physics.
Observation of the Charged-Particle Multiplicity Dependence of σ_{ψ(2S)}/σ_{J/ψ} in p-Pb Collisions at 8.16 TeV.
2025
Physical review letters
Chekhovsky V, Hayrapetyan A, Makarenko V, Tumasyan A, Adam W +2377 more
Plain English This study looked at a type of particle called charmonia, which consists of charm and anticharm quarks, to better understand how particles are produced in high-energy collisions of protons and lead. Researchers found that the ratio of two kinds of charmonia states—the excited state and the ground state—varies based on how many charged particles are present in the collision. Specifically, they observed a significant change in this ratio in certain conditions, which helps improve our understanding of particle interactions and production processes in such high-energy settings.
Who this helps: This benefits researchers in particle physics and could improve methods for studying fundamental particles.
Probing Gluon Fluctuations in Nuclei with the First Energy-Dependent Measurement of Incoherent J/ψ Photoproduction in Ultraperipheral PbPb Collisions.
2025
Physical review letters
Chekhovsky V, Hayrapetyan A, Makarenko V, Tumasyan A, Adam W +2377 more
Plain English This study investigated how gluons, which are particles that help hold protons and neutrons together, behave in heavy atomic nuclei during high-energy collisions. Researchers measured these gluons' properties in lead-lead (PbPb) collisions at a very high energy level of 5.02 TeV, discovering that at lower fractions of momentum, the reactions showed greater suppression than expected. These findings matter because they enhance our understanding of how gluons interact in dense matter, which can inform theories about nuclear physics and the structure of matter itself.
Who this helps: This helps physicists and researchers studying the fundamental forces of nature.
Observation of Λ Hyperon Local Polarization in p-Pb Collisions at sqrt[s_{NN}]=8.16 TeV.
2025
Physical review letters
Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Benato L +2394 more
Plain English This study looked at how certain particles, called hyperons, are polarized (or aligned) in proton-lead collisions at a very high energy of 8.16 TeV. Researchers found that the degree of polarization changed based on the number of charged particles produced in the collision; specifically, polarization decreased as more charged particles were produced but increased when looking at higher momentum particles. These findings challenge existing theories about how spin polarization works in such high-energy collisions and provide new information about the underlying physics involved.
Who this helps: This helps physicists and researchers studying particle interactions and the fundamental forces of nature.
Search for New Physics in Jet Multiplicity Patterns of Multilepton Events at sqrt[s]=13 TeV.
2025
Physical review letters
Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T +2394 more
Plain English This study examined the patterns of jet production in events where multiple particles (leptons) are produced during high-energy collisions of protons. After analyzing a large amount of data from these collisions, the researchers found that the patterns matched what is expected from existing theories, showing no significant signs of new physics or unexpected jet production. Specifically, they looked at events with one, two, and four leptons and found no unusual increases in jet counts, which is important for understanding potential new particles predicted by theories beyond the current model.
Who this helps: This helps researchers and physicists in their efforts to discover new particles and understand fundamental forces.
Search for the Rare Decay D^{0}→μ^{+}μ^{-} in Proton-Proton Collisions at sqrt[s]=13.6 TeV.
2025
Physical review letters
Chekhovsky V, Hayrapetyan A, Makarenko V, Tumasyan A, Adam W +2389 more
Plain English This particle physics search for the rare decay of a D0 meson into two muons used 64.5 inverse femtobarns of proton-proton collision data from the CMS detector at the Large Hadron Collider. No significant signal was found, and the upper limit on the decay rate was set at 2.4 × 10^-9 — the tightest constraint ever placed on any flavor-changing neutral current decay in the charm quark sector. This result sets an important benchmark for testing extensions to the Standard Model of particle physics.
Observation of Coherent ϕ(1020) Meson Photoproduction in Ultraperipheral PbPb Collisions at sqrt[s_{NN}]=5.36 TeV.
2025
Physical review letters
Chekhovsky V, Hayrapetyan A, Makarenko V, Tumasyan A, Adam W +2393 more
Plain English This particle physics study reports the first observation of coherent phi(1020) meson photoproduction from heavy nuclei, using data from ultraperipheral lead-lead collisions at the Large Hadron Collider's CMS detector. The measured production cross section was about five times lower than a model treating the nucleus as a collection of free nucleons, consistent with nuclear shadowing effects that suppress gluon density in nuclei at low momentum fractions. The result provides a new tool for probing the internal gluonic structure of heavy nuclei at an energy scale bridging two regimes of quantum chromodynamics.
Structure-function relationship study for sulfated protein therapeutics using hydrophobic interaction chromatography and mass spectrometry.
2024
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences
Luo H, Mahon D, Wong P, Madayiputhiya N, Chen Y +3 more
Plain English This study examined how a specific chemical change, called protein tyrosine sulfation, affects the performance of a type of antibody used in treatments. Researchers developed a new method to separate and measure antibodies with differing levels of sulfation, finding that sulfation is important since it can reduce the antibody's ability to bind to its target. This is significant because controlling sulfation is crucial for ensuring the effectiveness and safety of these therapeutic antibodies.
Who this helps: Patients who rely on antibody treatments will benefit from better quality control of their medications.
Search for Scalar Leptoquarks Produced via τ-Lepton-Quark Scattering in pp Collisions at sqrt[s]=13 TeV.
2024
Physical review letters
Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T +2358 more
Plain English This study looked for a type of particle called scalar leptoquarks, which could connect the world of particles like quarks and leptons. Researchers used data from high-energy collisions at the Large Hadron Collider (LHC) to analyze events that included jets and missing energy related to these particles. They found no evidence of leptoquarks and established limits on their possible characteristics, specifically excluding certain mass and strength combinations.
Who this helps: This research benefits physicists studying fundamental particles and the underlying forces of the universe.
New Structures in the J/ψJ/ψ Mass Spectrum in Proton-Proton Collisions at sqrt[s]=13 TeV.
2024
Physical review letters
Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T +2360 more
Plain English Researchers studied proton-proton collisions at high energy and discovered three new structures in the mass spectrum of particles called J/ψ. They found one significant structure at a mass of about 6638 MeV and another at around 6847 MeV, which matches a previously identified particle named X(6900). This study is important because it enhances our understanding of particle interactions and the fundamental forces in nature.
Who this helps: This benefits scientists and researchers in particle physics.
Search for exotic decays of the Higgs boson to a pair of pseudoscalars in theandfinal states.
2024
The European physical journal. C, Particles and fields
, Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW +2358 more
Plain English This study looked for unusual ways the Higgs boson, a fundamental particle, might decay into two other particles called pseudoscalars. Researchers analyzed data from proton collisions at a large particle collider and found no clear evidence for these rare decays. They set upper limits on how often the Higgs boson could decay into these pseudoscalars, showing that in most scenarios they considered, these decays were unlikely to happen more than a certain amount.
Who this helps: This research benefits physicists looking to understand the fundamental forces and particles in the universe.
Search for Baryon Number Violation in Top Quark Production and Decay Using Proton-Proton Collisions at sqrt[s]=13 TeV.
2024
Physical review letters
Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T +2331 more
Plain English This research examined how top quarks behave during their production and decay, particularly looking for rare events where a baryon number violation might occur. The study used data from high-energy proton collisions and found no significant differences from established predictions, but it did set stricter limits on how often these unusual processes might happen. The findings improved previous limits by a significant factor, making them much tighter than before, indicating that such violations, if they exist, are extremely rare.
Who this helps: This research helps physicists studying fundamental particles and their interactions.
Search for Narrow Trijet Resonances in Proton-Proton Collisions at sqrt[s]=13 TeV.
2024
Physical review letters
Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T +2350 more
Plain English This study looked for new particles that could decay into three jets (small bursts of energy) created during high-energy collisions of protons at the Large Hadron Collider. Researchers analyzed a large amount of collision data but did not find any signs of these new particles between the energy ranges of 1.75 and 9.00 TeV. Their findings set new limits on certain theoretical particles, which helps refine our understanding of fundamental physics.
Who this helps: This helps physicists studying the fundamental forces and particles in the universe.
An Umbrella Review of Systematic Reviews on Trauma Informed Approaches.
2024
Community mental health journal
Mahon D
Plain English This paper reviewed existing studies on trauma-informed care, which aims to support people who have experienced trauma in various settings. Out of over 5,297 articles examined, only 14 systematic reviews were included, covering about 311 studies involving a total of 157,724 individuals. The findings showed that while many reviews reported using different methods of trauma-informed approaches, only about 28% were of high quality, highlighting the need for better research to truly understand how to implement these approaches effectively.
Who this helps: This helps patients who have experienced trauma and the healthcare providers who care for them.
Evidence for the Higgs Boson Decay to a Z Boson and a Photon at the LHC.
2024
Physical review letters
Aad G, Abbott B, Abeling K, Abicht NJ, Abidi SH +5287 more
Plain English This study looked for evidence of a particle called the Higgs boson breaking down into two other particles: a Z boson and a photon, using data from the Large Hadron Collider collected from 2015 to 2018. Researchers found a significant signal that was 2.2 times stronger than what we expected based on existing theories, which is a positive confirmation of current scientific understanding. This finding matters because it helps to validate the theories in particle physics and enhances our knowledge of how fundamental particles interact.
Who this helps: This helps physicists and researchers in the field of particle physics.
Combination of Measurements of the Top Quark Mass from Data Collected by the ATLAS and CMS Experiments at sqrt[s]=7 and 8 TeV.
2024
Physical review letters
Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T +5283 more
Plain English This study combined results from 15 measurements of the top quark mass from two experiments, ATLAS and CMS, using data from high-energy particle collisions. They found that the average mass of the top quark is about 172.52 GeV, with a very small margin of error of 0.33 GeV. This accurate measurement helps improve our understanding of fundamental particles, which is important for physics and could lead to advancements in particle theory.
Who this helps: This helps physicists and researchers working in particle physics.
Measurement of Energy Correlators inside Jets and Determination of the Strong Coupling α_{S}(m_{Z}).
2024
Physical review letters
Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T +2319 more
Plain English This study looked at how energy is distributed among particles in high-energy collisions of protons to understand the strong force that holds atomic particles together. Researchers found a precise value for a key parameter of this strong force, called the strong coupling constant, measuring it at 0.1229 with a small margin of error. This is important because it helps improve our understanding of fundamental forces in physics, which can have broader implications for areas like particle physics and the nature of the universe.
Who this helps: This helps physicists and researchers studying fundamental forces.
Portable Acceleration of CMS Computing Workflows with Coprocessors as a Service.
2024
Computing and software for big science
, Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW +2319 more
Plain English This research explored how to speed up computing for large scientific projects, specifically the CMS experiment at CERN, by using a method called Services for Optimized Network Inference on Coprocessors (SONIC). The study found that by offloading machine learning tasks to additional processors, like graphics processing units (GPUs), they could significantly accelerate data processing workflows. In practice, this led to better performance without losing speed, showing potential for broader applications in other computing tasks.
Who this helps: This benefits scientists and researchers working on large data projects.
Observation of Enhanced Long-Range Elliptic Anisotropies Inside High-Multiplicity Jets in pp Collisions at sqrt[s]=13 TeV.
2024
Physical review letters
Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T +2330 more
Plain English Researchers studied how particles behave inside jets created during proton-proton collisions at very high energy levels (13 TeV). They found that jets with fewer charged particles showed a decrease in a specific type of particle alignment, while jets with more than 80 charged particles indicated a surprising increase in alignment, which models could not explain. This matters because it provides new insights into how particles interact and evolve within jets, improving our understanding of fundamental physics.
Who this helps: This helps physicists and researchers studying particle physics and the fundamental forces of nature.
The European physical journal. C, Particles and fields
, Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW +2350 more
Plain English This study looked at a specific type of particle decay and confirmed its occurrence for the first time through experiments with protons colliding. The researchers found that the decay is significantly rare, with a measurement showing it happens fewer than one in several instances compared to a similar decay process. This discovery is important because it helps scientists understand the behavior of particles at a fundamental level.
Who this helps: This helps researchers and physicists studying particle physics and the fundamental forces of nature.
Search for the Z Boson Decay to ττμμ in Proton-Proton Collisions at sqrt[s]=13 TeV.
2024
Physical review letters
Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T +2398 more
Plain English Researchers at CERN searched for a specific decay of the Z boson into pairs of tau and muon particles using data from high-energy proton collisions. They confirmed that the observed data matched expected outcomes and set an upper limit on how often this decay occurs—about 6.9 times more than what standard models predict. This research is important because it helps scientists understand how fundamental particles interact and could provide insights into new physics beyond current theories.
Who this helps: This benefits physicists and researchers working on particle physics and those studying the fundamental forces of nature.
Search for Soft Unclustered Energy Patterns in Proton-Proton Collisions at 13 TeV.
2024
Physical review letters
Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T +2390 more
Plain English This study looked for unusual energy patterns in high-energy proton collisions using data from experiments at the Large Hadron Collider. Researchers collected data from 2016 to 2018 and found no signs of these unusual energy patterns, which were expected to arise from specific theoretical models. As a result, they established limits on how often these energy patterns might occur, helping refine our understanding of particle physics.
Who this helps: This benefits physicists researching fundamental forces and particles.
Searches for Pair-Produced Multijet Resonances Using Data Scouting in Proton-Proton Collisions at sqrt[s]=13 TeV.
2024
Physical review letters
Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T +2389 more
Plain English This study looked for specific types of particles created when protons collide at a very high energy level. Researchers analyzed data from these collisions and found new evidence related to certain theoretical particles predicted by advanced physics models. This helps us better understand the behavior of particles at the smallest scales and narrows down possibilities for future discoveries in particle physics.
Who this helps: This benefits physicists and researchers exploring advanced theories in particle physics.
Search for Inelastic Dark Matter in Events with Two Displaced Muons and Missing Transverse Momentum in Proton-Proton Collisions at sqrt[s]=13 TeV.
2024
Physical review letters
Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T +2350 more
Plain English Researchers looked for a type of dark matter using data from high-energy collisions of protons, analyzing 138 trillion collisions from the Large Hadron Collider. They did not find any evidence of this specific type of dark matter, which means there was no increase in events that would signal its presence. However, they were able to establish upper limits on how often this dark matter could be produced, helping to refine our understanding of it.
Who this helps: This helps scientists studying dark matter and its properties.
Observation of WWγ Production and Search for Hγ Production in Proton-Proton Collisions at sqrt[s]=13 TeV.
2024
Physical review letters
Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T +2363 more
Plain English This research focused on collisions between protons at a very high energy of 13 TeV to study the production of specific particles, namely WWγ and Hγ. The team confirmed the production of WWγ with a strong significance, finding a measurement of 5.9 femtobarns, which aligns with established quantum physics predictions. These findings are important because they enhance our understanding of particle interactions and the behavior of the Higgs boson.
Who this helps: This benefits physicists and researchers in the field of particle physics.
Development of a physical activity counseling intervention for people with chronic respiratory disease based on the health action process approach.
2023
Pilot and feasibility studies
Tappan RS, Ettinger JR, Mahon D, Mroz SE, Hall W +5 more
Plain English This study focused on creating a new program to help people with chronic respiratory diseases increase their physical activity. Researchers worked with a group of patients, a doctor, and a behavior expert to develop and refine this program over five months. They found that the program received high ratings for acceptability, ranging from 4.0 to 5.0 on a five-point scale, which means the participants felt it was helpful and suitable for their needs.
Who this helps: This benefits patients with chronic respiratory diseases by providing them with tailored support to improve their physical activity levels.
Measurement of the Dependence of the Hadron Production Fraction Ratios f_{s}/f_{u} and f_{d}/f_{u} on B Meson Kinematic Variables in Proton-Proton Collisions at sqrt[s]=13 TeV.
2023
Physical review letters
Tumasyan A, Adam W, Andrejkovic JW, Bergauer T, Chatterjee S +2322 more
Plain English This study examined how the production of certain particles called B mesons changes based on their energy and motion during high-energy collisions between protons. Researchers found that the ratio of two specific types of B mesons, B_s and B, changes with their energy and stabilizes at high energy levels, while the ratio of another pair of B mesons, B and B_d, remains consistent and doesn't vary with energy or motion. These findings help us understand the behavior of fundamental particles, which is important for advancing particle physics.
Who this helps: This helps physicists and researchers studying the basic components of matter.
A search for decays of the Higgs boson to invisible particles in events with a top-antitop quark pair or a vector boson in proton-proton collisions at.
2023
The European physical journal. C, Particles and fields
Tumasyan A, Adam W, Andrejkovic JW, Bergauer T, Chatterjee S +2319 more
Plain English This study looked for signs of Higgs bosons decaying into "invisible" particles, which aren't directly detectable, in specific particle collision events. Researchers found that the upper limit for this type of decay is 0.54%, which means that at most, 0.54% of Higgs bosons could turn into invisible particles. Combining this with earlier findings, they established a more precise upper limit of 0.15%, which is important for understanding the properties of the Higgs boson and its role in the universe.
Who this helps: This benefits physicists and researchers studying particle physics and the fundamental forces of nature.
Probing Small Bjorken-x Nuclear Gluonic Structure via Coherent J/ψ Photoproduction in Ultraperipheral Pb-Pb Collisions at sqrt[s_{NN}]=5.02 TeV.
2023
Physical review letters
Tumasyan A, Adam W, Andrejkovic JW, Bergauer T, Chatterjee S +2327 more
Plain English This study focused on how gluons, the particles that help bind protons and neutrons together in a nucleus, behave in very large lead-lead collisions at high energies. Researchers measured how often specific particles (J/ψ mesons) were produced when these collisions occurred at energies reaching 5.02 TeV. They found that the production rate increased quickly at lower energy levels but leveled off at around 40 GeV, indicating that they were exploring a new area of small Bjorken-x gluons, which current models struggle to explain.
Who this helps: This research benefits physicists and researchers studying nuclear interactions and the fundamental structure of matter.