2117 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.
Using calibration data from the XENONnT detector, this study presents the most precise direct measurements to date of the ground-state decay branching ratios for and , thereby significantly improving background modeling for rare-event searches like dark matter and neutrino experiments.
This paper presents an optimized digital filtering algorithm for cryogenic detectors that significantly reduces pile-up induced background in neutrinoless double beta decay searches by 31% compared to previous methods, while maintaining high signal efficiency.
This paper investigates how Earth's matter effects and the finite momentum of axion dark matter influence experimental searches, finding that while canonical axion models remain largely unaffected, lighter axions with stronger couplings may experience reduced field values but enhanced spatial gradients, significantly altering detection sensitivity.
This paper proposes that interactions between hidden sector particles and neutron star nucleons can overcome energy barriers to trigger deconfinement phase transitions, potentially converting neutron stars into black holes or gamma-ray bursts, thereby allowing the observed existence of ancient neutron stars to set constraints on dark matter interactions and nucleon decay lifetimes that are orders of magnitude stricter than terrestrial limits.
Using proton-proton collision data collected by the CMS experiment at 13 TeV, this study measures the ratio of to branching fractions via three-prong decays, finding a combined result consistent with the Standard Model prediction and providing no evidence for lepton flavor universality violation.
This paper presents and validates a method for measuring the momenta of charged particles in the FASER emulsion detector using multiple Coulomb scattering, demonstrating its effectiveness from a few GeV to several TeV through Monte Carlo simulations, test beam data, and background muon analysis.
This paper presents the first first-principles calculation of the Migdal effect in isolated atoms, establishing the conditions for adiabatic suppression and confirming that direct dark matter searches operate within the unsuppressed regime.
This paper presents state-of-the-art, next-to-leading-order hadron-level predictions for deep-inelastic scattering with multiple final-state particles, consistently merged into single samples to support physics studies at future colliders including the Electron-Ion Collider, LHeC, and FCC-eh.
This study employs an effective Lagrangian approach to successfully reproduce the production cross sections of high-orbital-excitation kaons in reactions and predicts that other such states exhibit sizable, forward-peaked cross sections, indicating their strong potential for experimental observation.
This study demonstrates that the CEPC, utilizing jet flavor tagging on simulated -pair decay data at , can achieve high-precision, largely model-independent determinations of CKM matrix elements and with projected statistical uncertainties of and , respectively, thereby offering stringent tests of the Standard Model and sensitivity to new physics.