hep-ex papers | Gist.Science

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.

Numerical Study of MRW-Type Unintegrated Double Parton Distribution Functions from Non-Factorized DPDFs

This paper presents a numerical study of MRW-type unintegrated double parton distribution functions constructed from non-factorized GS09 collinear DPDFs, comparing the performance and characteristics of double modified KMRW, double virtuality ordered MRW, and a normalization-matched variant to analyze their transverse momentum dependence, normalization properties, and sensitivity to longitudinal correlations.

R. Kord Valeshabadi, S. Rezaie, K. Azizi2026-05-18⚛️ hep-ex

Inclusive charm and bottom quark pair production cross sections at hadron colliders at next-to-next-to-leading-order accuracy

This paper presents a comprehensive study of inclusive charm and bottom quark pair production cross sections across a wide range of collision energies using next-to-next-to-leading-order (NNLO) calculations with the new MaunaKea code, demonstrating that these advanced predictions significantly enhance accuracy and reduce theoretical uncertainties compared to previous NLO results, thereby achieving agreement with experimental data and offering valuable constraints on gluon density and the bottom-quark mass.

David d'Enterria, Felix Hekhorn, Ilkka Helenius, Van Dung Le, Hannu Paukkunen2026-05-18⚛️ nucl-ex

Observation of a $B_c^{*+}$ meson with the ATLAS detector

Using 13 TeV proton-proton collision data from the ATLAS detector, physicists have achieved the first observation of the $B_c^{*+}$ meson, a new vector state decaying into a $B_c^+$ meson and a photon, with a statistical significance exceeding 8 standard deviations.

ATLAS Collaboration2026-05-18⚛️ hep-ex

Improving robustness of jet tagging algorithms with adversarial training: exploring the loss surface

This paper demonstrates that adversarial training enhances the robustness of deep learning-based jet flavor tagging algorithms against input distortions, which serve as a proxy for systematic uncertainties, by leveraging geometric insights from the loss surface to maintain high performance while mitigating model vulnerabilities.

Annika Stein2026-05-15⚛️ hep-ph

Detecting dark matter using optically trapped Rydberg atom tweezer arrays

This paper proposes a novel scheme for detecting wave-like dark matter, specifically dark photons, by utilizing large ensembles of Rydberg atoms trapped in optical tweezer arrays to observe DM-induced excitations between energy levels, with the ability to scan different dark matter masses via external magnetic field tuning.

So Chigusa, Taiyo Kasamaki, Toshi Kusano, Takeo Moroi, Kazunori Nakayama, Naoya Ozawa, Yoshiro Takahashi, Atsuhiro Umemoto, Amar Vutha2026-05-15🔬 physics.atom-ph

Addendum to multiplicities of charged pions, kaons and unidentified charged hadrons on an isoscalar target measured by COMPASS Collaboration

This paper presents an updated set of isoscalar multiplicities for charged pions, kaons, and unidentified hadrons measured by the COMPASS Collaboration, incorporating improved QED radiative corrections via the DJANGOH Monte Carlo generator to ensure consistency with recent proton-target results and superseding previous 2017 publications.

The COMPASS Collaboration2026-05-15⚛️ hep-ex

Collider-Bench: Benchmarking AI Agents with Particle Physics Analysis Reproduction

This paper introduces Collider-Bench, a novel benchmark designed to evaluate the ability of autonomous AI agents to reproduce complex Large Hadron Collider particle physics analyses using public resources, revealing that current general-purpose coding agents still fall short of human physicists in reliably executing these tasks.

Darius A. Faroughy, Sofia Palacios Schweitzer, Ian Pang, Siddharth Mishra-Sharma, David Shih2026-05-15⚛️ hep-ex

A New Source of Millicharged Particles: Secondary Showers in the LHC Forward Absorber

This paper identifies and quantifies a significant new source of millicharged particles at the LHC, demonstrating that secondary showers in the forward TAXN absorber can enhance the expected signal yield for the proposed FORMOSA detector by approximately 50% for light masses, thereby establishing downstream production as a critical component for realistic sensitivity projections in future high-luminosity searches.

Jyotismita Adhikary, Peiran Li, Zhen Liu, Sebastian Trojanowski, Azam Zabihi2026-05-15⚛️ hep-ph

Double Metric Learning for Building Directed Graphs with Chain Connections for the ATLAS ITk Detector

This paper proposes a "Double Metric Learning" approach that learns two distinct node representations to resolve conflicts in constructing directed graphs with chain connections for the ATLAS ITk detector, demonstrating improved performance in graph construction and edge direction prediction for high transverse momentum particles compared to simple metric learning.

Jay Chan2026-05-15⚛️ hep-ex

Constraints on anomalous Higgs boson couplings to vector bosons and fermions using the $\gamma\gamma$ final state in proton-proton collisions at $\sqrt{s}$ = 13 TeV

Using 138 fb $^{-1}$ of proton-proton collision data at $\sqrt{s}$ = 13 TeV collected by the CMS experiment, this study constrains anomalous Higgs boson couplings to vector bosons and fermions via the diphoton decay channel, finding results consistent with Standard Model expectations.

CMS Collaboration2026-05-15⚛️ hep-ex

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