1442 papers
Hep-Ex explores the fascinating intersection where particle physics meets experimental reality. This field investigates how scientists build massive detectors and accelerate particles to test the fundamental laws of nature, turning abstract theories into measurable data. It is the rigorous process of searching for new particles or forces that could reshape our understanding of the universe, often requiring years of collaboration and engineering.
At Gist.Science, we ensure these discoveries become accessible to everyone. We process every new preprint in this category directly from arXiv, generating both plain-language explanations for curious readers and detailed technical summaries for specialists. Our goal is to bridge the gap between complex experimental results and public understanding without losing scientific nuance.
Below are the latest papers in Hep-Ex, freshly summarized and ready for you to explore.
This paper presents a comprehensive spin density matrix analysis of polarization transfer in polarized collisions producing decays into octet baryon-antibaryon pairs, confirming theoretical predictions for angular distributions and demonstrating how longitudinal beam polarization at future facilities like the STCF can serve as a new experimental tool to test decay mechanisms and explore baryonic spin entanglement.
This paper proposes using a tons-scale hydrocarbon scintillator detector at the Spallation Neutron Source to search for sub-GeV dark sector particles, such as axion-like particles and heavy neutral leptons, produced in muon decays, demonstrating the potential for order-of-magnitude sensitivity improvements over current limits through effective cosmic ray background rejection.
This paper introduces MiniFool, a physics-constraint-aware adversarial attack algorithm that minimizes a cost function combining a test statistic with target score deviation to evaluate the robustness of deep neural networks in particle and astroparticle physics, as demonstrated through applications on MNIST, IceCube tau neutrino data, and CMS Open Data.
This paper proposes a one-loop radiative neutrino mass model featuring singlet-doublet dark matter and -odd scalars, demonstrating that quartic Higgs-scalar interactions can induce a first-order phase transition producing observable gravitational waves while simultaneously satisfying constraints from neutrino mass, the muon anomalous magnetic moment, and lepton flavor violation.
This paper presents the first dedicated study of the boosted channel at the LHC, demonstrating that this topology enhances sensitivity to both non-resonant quartic gauge-Higgs coupling deviations and resonant heavy scalar decays, thereby improving constraints on new physics parameters and extending discovery reach in the high-energy double-Higgs regime.
Using 101 fb of 13 TeV proton-proton collision data from the CMS detector, this study searches for dark matter produced in association with a Higgs boson decaying to bottom quarks, finding no evidence of new physics and setting 95% confidence level exclusion limits on baryonic-Z' and 2HDM+a models.
This paper proposes a quantum information-inspired framework where spin entanglement in quark-antiquark pairs created from the QCD vacuum undergoes decoherence via string breaking during hadronization, successfully explaining hyperon spin-correlation data from RHIC and the LHC.
The NA64 experiment at CERN utilized its full 2016–2022 electron-beam dataset to establish the most stringent laboratory constraints to date on the coupling constant of a boson for sub-GeV masses, significantly improving sensitivity through a threefold increase in statistics and the inclusion of resonant annihilation channels.
The Fermilab Muon g-2 experiment presents its final measurement of the positive muon anomalous magnetic moment using data from 2021 to 2023, achieving a precision of 127 ppb and establishing a new experimental world average that continues to show a significant discrepancy with Standard Model predictions.
Using BESIII data, this paper reports the first amplitude analysis of , revealing that the observed line shape significantly deviates from conventional models and cannot be satisfactorily described without compromising the physical consistency of the resonance's pole position.