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 extends the topological diagram approach to charmed baryon decays into baryons and vector mesons by incorporating the Korner-Pati-Woo theorem to derive symmetry relations, extract form factors from experimental data, and predict branching fractions and polarization observables, revealing the significant role of tensor couplings in these processes.
Using 139 fb of 13 TeV proton-proton collision data from the ATLAS detector, this study searches for pair-produced vector-like -quarks decaying into Higgs-top final states in the lepton-plus-jets channel, finding no significant excess over Standard Model predictions and setting 95% confidence level lower mass limits of 1.40 to 1.66 TeV depending on the -quark representation and branching fraction.
This paper proposes a compositeness framework where fermion generations are elementary fields whose Yukawa hierarchies and mixing patterns arise from chains of spin-0 subconstituents governed by a discrete gauge symmetry, successfully predicting key observables like the neutrino mass, axion mass, and from just two fundamental parameters.
This paper demonstrates that uncertainties in modeling final-state interactions (FSI) significantly impact neutrino energy estimation for DUNE and Hyper-K, with each experiment being sensitive to distinct FSI mechanisms, thereby highlighting the critical need for refined theoretical and experimental approaches to meet future oscillation precision goals.
Using 138 fb of 13 TeV proton-proton collision data from the CMS experiment, this study presents a search for nonresonant Higgs boson pair production and resonant production via new scalar bosons in the final state, finding no evidence for signal and setting stringent 95% confidence level upper limits on various production cross sections and coupling parameters.
Using 2017 CMS data from proton-proton collisions at = 5.02 TeV, this study measures the angular structure of charm-tagged jets and finds that small-angle emission suppression is consistent with the dead-cone effect in late- grooming, while similar suppression in soft-drop selections is attributed to large-angle gluon splitting into charm quark-antiquark pairs.
This paper presents the first experimental demonstration of using single-molecule magnet crystals to detect particle scattering via induced magnetic avalanches, establishing a new platform for high-efficiency quantum energy detection that could be optimized for sub-eV applications.
This paper investigates how deviations from unitarity in the leptonic mixing matrix, arising from either heavy or light sterile neutrinos, modify coherent elastic neutrino-nucleus scattering and elastic neutrino-electron scattering, presenting sensitivity projections for a future upscaling of the CONUS+ experiment that demonstrate its potential to probe TeV-scale new physics.
This paper presents a complete calculation of -meson decay widths up to corrections within and beyond the Standard Model by deriving analytic expressions for all matching coefficients of two-quark operators and previously missing weak-annihilation contributions, thereby finalizing the theoretical framework for non-leptonic -quark decays relevant to -meson lifetimes and addressing tensions in QCD factorization.
Using 13 TeV proton-proton collision data corresponding to 5.4 fb of integrated luminosity, the LHCb experiment conducted a search for lepton-number-violating decays, observed no significant signal, and established 95% confidence level upper limits on the branching fractions of and for the and modes, respectively.