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 study analyzes high-precision exclusive photon leptoproduction data to extract proton electromagnetic form factors, revealing a significant tension between CLAS 2018 and other datasets while supporting a smaller proton charge radius consistent with muonic hydrogen spectroscopy and the PRad measurement.
This paper demonstrates that the Short-Baseline Near Detector (SBND) can probe previously unexplored light dark matter parameter space by detecting MeV-scale photon "blips" from nuclear deexcitation, utilizing state-of-the-art ab initio nuclear calculations to predict signals in argon nuclei.
This paper introduces an automated Python package called `wilson` that implements the renormalization group equations for the Standard Model Effective Field Theory augmented with sterile neutrinos (SMEFT), enabling consistent phenomenological studies of RG running effects above the electroweak scale.
Using a large dataset of events collected by the BESIII detector, this study presents the first complete determination of the spin density matrix in , revealing a significant transverse polarization of the hyperon and providing evidence for quantum entanglement through the violation of the CHSH Bell inequality.
This paper presents the design, optical characterization, and Geant4 simulation of a custom scintillating fibre beam monitor using SiPM arrays, which is being developed for non-destructive isotopic analysis in the CHNet-MAXI experiment at ISIS.
This study demonstrates that eight SiPM models from various manufacturers maintain operational stability and recover optimal performance after thermal annealing following exposure to high-intensity 29 MeV/c muon beams, validating their suitability for innovative scintillation-based low-momentum muon beam monitors.
This paper extends a previous study by constructing effective shell-model decay operators for neutrinoless double-beta decay in Ca, Ge, and Se up to next-to-next-to-leading order, including for the first time three-body current contributions at next-to-next-to-next-to-leading order, to evaluate theoretical uncertainties arising from both model space limitations and chiral expansion truncation.
This paper utilizes LUX-ZEPLIN (LZ) experimental data to establish new constraints on heavy sterile fermions produced via atmospheric neutrino up-scattering through various mediators, demonstrating that while dark matter detectors offer competitive limits for masses above 50 MeV, the observed 248 keV event is unlikely to be explained by this mechanism without invoking non-perturbative couplings.
This paper presents the first direct measurements of the radiogenic and muon-induced neutron background at the shallow-underground Colorado Underground Research Institute (CURIE), characterizing the local neutron flux to provide essential quantitative input for planning future low-background experiments.
The paper introduces FeynFacet, an AI-driven workflow that autonomously develops and executes programs to perform analytic next-to-leading-order QCD calculations, successfully reproducing established results and deriving new hard functions for transverse spin transfer in proton-proton and lepton-proton collisions.