2511 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 presents a Geant4-based simulation study evaluating the sensitivity of a proposed missing-mass search for a light dark photon () using a 500 MeV positron beam on a liquid-hydrogen target at Jefferson Lab, projecting a kinetic-mixing parameter sensitivity of for masses between 7 and 19 MeV.
The CMS experiment analyzed proton-proton collision data at 13 TeV to provide evidence for the dead-cone effect in bottom quark jets, observing a 4.3 standard deviation preference for a parton shower model that includes this mass-dependent suppression of collinear gluon emissions over one that does not.
Using 2.46 tonne-years of data from the XENONnT experiment, researchers achieved the first detection of low-energy solar neutrinos via elastic neutrino-electron scattering with a 5.0σ significance, setting a new record for the lowest energy threshold in neutrino detection and measuring a pp neutrino flux consistent with previous Borexino results.
This article reviews the evolution of fully charmed tetraquarks from theoretical predictions to a newly established family of hadrons, highlighting recent CMS discoveries by Nanjing Normal University and Tsinghua University teams that confirmed their existence, quantum numbers, and resonance interference, thereby advancing the understanding of nonperturbative Quantum Chromodynamics.
This white paper outlines the LUNE experiment at the HIAF facility, which aims to utilize high-intensity muon beams to resolve fundamental questions in nuclear and particle physics, including the proton charge radius puzzle and nucleon structure, through a two-phase program of precision elastic and inelastic scattering measurements.
This paper presents the first operator-resolved sensitivity estimates for photon-dark matter elastic scattering using 17 years of Fermi-LAT data toward the Galactic center, finding that while the method uniquely probes certain dark matter scenarios evading other constraints, its current reach is limited by low cutoff scales and is superseded by existing CMB and direct-detection bounds.
Using 10.7 years of high-energy upward-going muon neutrino data from the IceCube Neutrino Observatory, this study places the strongest or previously unexplored constraints on low-scale gravity scenarios by limiting the compactification radius of large extra dimensions and the number of Standard Model copies.
This paper presents a high-precision Standard Model prediction for the inclusive decay branching ratio, , achieved by incorporating complete corrections and exact charm-mass dependence, which aligns with experimental data and sets a 95% confidence level lower bound of 670 GeV on the charged Higgs boson mass in the Two-Higgs-Doublet Model II.
Using transverse-momentum-dependent QCD factorization, this paper demonstrates that jet-induced anisotropy at the Electron-Ion Collider imposes a parity selection rule on polarized asymmetries, fundamentally altering the expected left-right and up-down symmetries of structure functions like the Sivers and worm-gear distributions across different harmonic orders.
The LHCb experiment reports the first measurement of the -to- production cross-section ratio in and $pp$ collisions at using SMOG2, observing a ratio of in collisions that signals the emergence of nuclear effects and establishes a baseline for future studies with larger collision systems.