⚛️ Category

hep-ex

2092 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.

⚛️ high-energy experiments

Measurement of Differential Cross Sections and Integrated Luminosity using Proton-Proton Elastic Scattering with HADES at T = 4.53 GeV and T = 1.60 GeV

This paper presents the first measurements of differential cross sections and integrated luminosity for elastic proton-proton scattering at kinetic energies of 4.53 GeV and 1.60 GeV using the upgraded HADES detector, yielding new slope parameters and providing essential data for theoretical modeling and future luminosity calibrations.

HADES Collaboration, R. Abou Yassine, J. Adamczewski-Musch, G. A. Appagere, M. Becker, A. Blanco, C. Blume, M. Bohman, Y (…)2026-09-04
⚛️ high-energy experiments

Energy-Energy Correlators in ZZ-Tagged Jets in $pp$ Collisions

This paper presents NLL′^{\prime}-accurate predictions for energy-energy correlators inside ZZ-tagged jets in proton-proton collisions, utilizing a framework that combines perturbative evolution with flavor-dependent non-perturbative fragmentation to probe the universality of the confinement scale and the transition from gluon- to quark-dominated fragmentation at forward rapidities.

João Barata, Zhong-Bo Kang, Xoán Mayo López, Jani Penttala, Yiyu Zhou2026-09-04
⚛️ nuclear experiments

Leading-Neutron Electroproduction at HERA and the EIC: Sullivan Process, Target Fragmentation, and Pion PDFs

This paper demonstrates that combining Sullivan process and target-fragmentation contributions in Pythia successfully describes HERA leading-neutron data across the full kinematic range, thereby enabling the extraction of pion parton distribution functions at smaller momentum fractions and providing optimized projections for future measurements at the Electron-Ion Collider.

Wen-Chen Chang, Chia-Yu Hsieh, Satyajit Puhan2026-09-04
⚛️ high-energy experiments

Constraints on mu-variations from the methanol CH3OH thermal lines in the Galaxy at galactocentric distances of 1.5 < D_GC < 13 kpc

This study analyzes thermal emission lines of E-methanol across seven massive clouds at galactocentric distances between 1.5 and 13 kpc to constrain variations in the electron-to-proton mass ratio, finding no statistically significant changes and establishing a weighted mean limit of (0.5±0.5)×10⁻⁷.

A. I. Shtein, J. S. Vorotyntseva, S. A. Levshakov2026-09-04
⚛️ nuclear theory

CGC-py: A Monte Carlo Event Generator for Gluon Saturation Physics

This paper introduces CGC-py, a Monte Carlo event generator that integrates Color Glass Condensate physics with parton branching and hadronization to consistently model deep-inelastic scattering, validating its predictions against experimental data and demonstrating its utility for probing gluon saturation effects in future electron-ion collider measurements.

Haowu Duan, Cong Yi, Si-Wei Dai, Shu-Yi Wei, Wenbin Zhao, Liang Zheng2026-09-04
⚛️ high-energy experiments

Study of KS0K_{S}^{0}-KL0K_{L}^{0} asymmetry in the decays D0→KS0ωD^0 \to K_{S}^{0}\omega and D0→KL0ωD^0 \to K_{L}^{0} \omega

Using 7.93 fb⁻¹ of e+e−e^+e^- annihilation data collected by the BESIII detector at 3.773 GeV, this study measures the absolute branching fractions of D0→KS0ωD^0 \to K_{S}^{0} \omega and D0→KL0ωD^0 \to K_{L}^{0} \omega decays and determines their KS0K_{S}^{0}-KL0K_{L}^{0} branching-fraction asymmetry to be (4.2±1.0±0.9±2.8)%(4.2 \pm 1.0 \pm 0.9 \pm 2.8)\%, accounting for statistical, systematic, and interference-related uncertainties.

BESIII Collaboration, M. Ablikim, M. N. Achasov, P. Adlarson, X. C. Ai, C. S. Akondi, R. Aliberti, A. Amoroso, Q. An, Y. (…)2026-09-04
⚛️ nuclear experiments

First Measurement of Near-Threshold J/{\psi} Photoproduction on the Neutron

Using the CLAS12 detector at Jefferson Lab, researchers report the first measurement of near-threshold J/ψJ/\psi photoproduction cross sections on the neutron and bound proton, providing new constraints on production mechanisms and evidence for modifications to the gluonic structure of nucleons within the nuclear medium.

R. Tyson, D. G. Ireland, B. McKinnon, P. Chatagnon, V. Kubarovsky, S. Stepanyan, A. G. Acar, P. Achenbach, J. S. Alvarad (…)2026-09-04
⚛️ high-energy experiments

Testbeam characterization of a 3D silicon sensor read out by Timepix4

This paper presents testbeam results characterizing a 300-µm-thick 3D silicon sensor bump-bonded to a Timepix4 ASIC, demonstrating a time resolution of 245 ps and 97% hit efficiency at normal incidence, which improves to 153 ps and over 99% efficiency at an optimal 8° angle with advanced corrections for clock variations and charge sharing.

E. Chatzianagnostou, M. J. Madurai, K. Akiba, D. Bacher, R. Bates, M. van Beuzekom, T. Bischoff, V. Coco, R. Dumps, T. E (…)2026-09-04
⚛️ high-energy experiments

Monitoring antiproton numbers with a CMOS detector in a dense-track environment

This paper presents a method using a commercial CMOS camera to monitor incident antiproton numbers for the GBAR experiment by detecting ionizing particles from annihilation events on microchannel plates, achieving approximately 10% accuracy in a dense-track environment while minimizing systematic uncertainties through high-granularity tracking and Geant4-based material corrections.

C. Regenfus, P. Adrich, I. Belosevic, F. Benkel, M. Chung, P. Cladé, P. Comini, P. Crivelli, P. Debu, A. Douillet, S. Ge (…)2026-09-04
⚛️ high-energy experiments

Inelastic Signatures of Electroweak Dark Matter

This paper proposes a minimal electroweak dark matter model involving coupled Majorana and Dirac multiplets that explains the high-energy nuclear recoil events observed by the LUX-ZEPLIN collaboration through inelastic scattering with specific mass splittings, while simultaneously predicting correlated elastic spin-independent signals for various multiplet representations.

Juri Smirnov, Spencer Griffith, John F. Beacom2026-09-04