1404 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 investigates exclusive hadron observables in neutrino-induced multinucleon knockout by comparing kinematic variables from the Valencia model with current event generator treatments and nuclear re-scattering effects, while assessing their detectability in present and future long-baseline neutrino experiments.
This paper proposes a mechanism to circumvent stringent experimental constraints on Mesogenesis models—which explain baryon asymmetry and dark matter via meson decays—by utilizing a late-time phase transition to dynamically increase dark sector particle masses, thereby kinematically forbidding the decays that would otherwise violate proton lifetime limits and observed CP violation bounds.
This paper reports on the development and application of the HF-NRevo framework, which provides a consistent perturbative description of heavy-flavor fragmentation for -wave quarkonia and fully heavy tetraquarks, enabling new investigations into medium effects in heavy-ion collisions and the intrinsic charm content of the proton at future collider facilities.
Using 2024 proton-proton collision data from the LHCb Run 3 detector, this paper reports the first observation of the doubly charmed baryon decaying into with a statistical significance exceeding seven standard deviations and provides a precise measurement of its mass and mass difference relative to the .
This paper reports the successful fabrication and first cryogenic operation of two compact n-type germanium ring-contact (GeRC) prototypes, establishing a proof-of-principle workflow for their complex non-planar geometry and demonstrating stable performance at 77 K as a foundational step toward scalable, low-background detectors for rare-event experiments like LEGEND-1000.
This paper presents the first lattice-QCD determination of dimension-six four-quark matrix elements for heavy-meson lifetime ratios using gradient flow renormalization on 2+1-flavor domain-wall fermion ensembles, achieving NNLO matching to the scheme and providing precise bag parameters with a full error budget.
This paper demonstrates that the gradient flow combined with short flow-time expansion (GF+SFTX) serves as an effective renormalization procedure for calculating precise bag parameters of four-quark operators relevant to neutral heavy-meson mixing and lifetimes, successfully applying this method to six RBC/UKQCD domain-wall fermion ensembles to obtain results consistent with existing determinations while providing a robust framework for handling power-divergent mixing in future lattice computations.
This paper computes next-to-leading order radiative corrections to the process by incorporating the non-perturbative pion structure via the generalized vector meson dominance model, comparing these results with the naive scalar QED approach to quantify model uncertainties for radiative return experiments at flavor factories.
This paper outlines the analysis techniques, background composition, and rejection procedures employed by the PADME experiment at Laboratori Nationali di Frascati to search for the Dark Photon via positron-electron annihilation using the missing mass technique.
This paper presents double-differential inclusive jet cross sections measured by the STAR detector in proton-proton collisions at and $510$ GeV, providing new constraints on the poorly known gluon parton distribution function in the proton through comparisons with next-to-next-to-leading order perturbative QCD calculations.