2503 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 reanalyzes the BESIII enhancement by comparing baryonium and final-state-interaction (FSI) interpretations, concluding that an energy-dependent FSI description offers the best balance of fit quality and model complexity while highlighting the sensitivity of pole extraction to amplitude parametrization.
This paper presents a prospective search for dark photons decaying into collimated, displaced muon pairs in exotic Higgs boson decays at the FCC-ee, demonstrating that a kinematics-based selection can achieve zero background while setting expected limits on the Higgs-to-dark-photon branching ratio across a broad range of masses and couplings.
Using 136 fb of 13 TeV proton-proton collision data, the CMS collaboration presents the first search for resonant and nonresonant pair production of dijet resonances decaying into b and light-flavor quarks, setting exclusion limits on top squarks and diquark models while observing local excesses with significances of up to 2.6 standard deviations.
This paper presents the first proof-of-concept application of Photon-to-Digital Converters (PDCs) in particle physics, demonstrating their potential to outperform traditional Silicon Photo-Multipliers in calorimetry and tracking while highlighting their ease of integration and operational advantages from a user perspective.
Using 2024 proton-proton collision data collected by the upgraded LHCb detector, researchers observed the doubly charmed baryon with a global significance of in the decay channel and measured its mass to be .
Using 387 million decays collected by the Belle II detector, this study presents the most precise hadronic-tagging determination of the lepton flavor universality ratios and , yielding results consistent with both Standard Model predictions and previous measurements.
This paper proposes a novel search for axions produced by atmospheric kaon decays () that subsequently decay into photon pairs within large underground detectors like Super-Kamiokande and IceCube, using existing data to derive new constraints on the axion decay constant for masses up to approximately 350 MeV.
This paper proposes a Type-II seesaw extension of the inelastic doublet dark matter model, where a scalar triplet induces necessary mass splitting and new annihilation channels to allow for TeV-scale dark matter that can explain the recent LZ230616 event while evading solar capture constraints and generating sub-eV neutrino masses.
Using 140 fb of 13 TeV proton-proton collision data collected by the ATLAS detector, this paper presents differential cross-section measurements of $WWbb$ events that reveal significant discrepancies between data and theoretical predictions in regions sensitive to the interference between singly and doubly resonant top-quark production, thereby providing new insights into top-quark production mechanisms and off-shell effects.
This paper presents a study on improving electron identification efficiency and purity for the MPD experiment at NICA by comparing traditional cut-based methods with machine learning classifiers (MLP and BDT) trained using the ROOT TMVA package.