⚛️ Category

hep-ex

1442 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.

Search for Higgs bosons produced in association with a high-energy photon via vector-boson fusion and decaying to a pair of bb-quarks in the ATLAS detector

Using 133 fb−1^{-1} of 13 TeV proton-proton collision data, the ATLAS collaboration performed a search for Standard Model Higgs bosons produced via vector-boson fusion in association with a high-energy photon and decaying to bbˉb\bar{b}, employing improved analysis techniques to measure a signal strength of 0.2±0.70.2 \pm 0.7 with an observed significance of 0.3 standard deviations, consistent with the background-only hypothesis.

ATLAS Collaboration2026-05-05⚛️ hep-ex

E-PCN: Jet Tagging with Explainable Particle Chebyshev Networks Using Kinematic Features

The paper introduces E-PCN, an explainable graph neural network that integrates four distinct kinematic feature-weighted graph representations to achieve state-of-the-art jet classification performance on the JetClass dataset while identifying angular separation and transverse momentum as the dominant factors driving its decisions.

Md Raqibul Islam, Adrita Khan, Mir Sazzat Hossain, Choudhury Ben Yamin Siddiqui, Md. Zakir Hossan, Tanjib Khan, M. Arshad Momen, Amin Ahsan Ali, AKM Mahbubur Rahman2026-05-05⚛️ hep-ex

Mass Spectra of ΛQΣˉQ\Lambda_Q\bar{\Sigma}_Q Hexaquark States in QCD Sum Rules

Using QCD sum rules with dimension-12 condensates, this study calculates the mass spectra of ΛQΣˉQ\Lambda_Q\bar{\Sigma}_Q hexaquark states and finds that the ΛcΣˉc\Lambda_c\bar{\Sigma}_c ground states lie around 5.8 GeV, consistent with BESIII's non-observation of a near-threshold bound state, while also predicting masses for hidden-bottom ΛbΣˉb\Lambda_b\bar{\Sigma}_b candidates.

Xuan-Heng Zhang, Cong-Feng Qiao2026-05-05⚛️ nucl-th

Probing Quantum Entanglement in τ+τ−\tau^+\tau^- Pairs via the ππ\pi\pi Channel at STCF

This paper presents a feasibility study demonstrating that the proposed Super Tau-Charm Facility (STCF) can effectively probe quantum entanglement and Bell-inequality violations in τ+τ−\tau^+\tau^- pairs via the ππ\pi\pi decay channel, achieving a reconstructed concurrence of 0.279±0.0070.279 \pm 0.007 through full Monte Carlo simulations at s=7\sqrt{s} = 7 GeV.

Xiaokang Li, Chentao Bao, Hai Chen, Mingyi Liu, Dayong Wang2026-05-05⚛️ hep-ex

HepScript: A Dual-Use DSL for Human-AI Collaborative Data Analysis Workflows in High-Energy Physics

This paper introduces HepScript, a dual-use Domain-Specific Language for High-Energy Physics that serves as a formal interface to abstract complex analysis logic, enabling human experts to write concise code while allowing AI agents to reliably generate executable specifications from literature, thereby significantly reducing manual effort and solving previously intractable automation challenges.

Junkun Jiao, Tong Liu, Ke Li, Weimin Song, Yipu Liao, Bolun Zhang, Beijiang Liu, Chang-Zheng Yuan, Yue Sun2026-05-05⚛️ hep-ex

Probing Saturation Effect in Heavy Meson Pair Correlation in Forward $pA$ Collisions

This paper investigates heavy meson pair correlations in forward proton-nucleus collisions by incorporating unified Sudakov resummation within the Color Glass Condensate framework, demonstrating good agreement with LHCb data and predicting a robust mass hierarchy in nuclear suppression that highlights the sensitivity of heavy quarks to gluon saturation effects.

Zhan Gao, Cyrille Marquet, Yu Shi, Bo-Wen Xiao2026-05-05⚛️ hep-ph

New Directions in Kaon Physics: Interference in K0→μ+μ−K^0\to\mu^+\mu^- as a New Golden Mode

This paper proposes that analyzing KL0K_L^0–KS0K_S^0 interference in the rare decay K0→μ+μ−K^0 \to \mu^+\mu^- transforms the channel into a clean probe of short-distance $CP$ violation, enabling LHCb to constrain the CKM parameter ∣A2λ5ηˉ∣|A^2\lambda^5\bar\eta| to within 35% of its Standard Model value and resolve the sign ambiguity of the KL0→γγK_L^0 \to \gamma\gamma amplitude with over 3σ\sigma significance by the high-luminosity LHC era.

Teppei Kitahara2026-05-05⚛️ hep-ph

Study of ttˉt\bar{t} threshold effects in eμe\mu differential distributions measured in s=13\sqrt{s}=13\,TeV $pp$ collisions with the ATLAS detector

The ATLAS collaboration reports evidence exceeding three standard deviations for the formation of quasi-bound states near the ttˉt\bar{t} threshold in 13 TeV $pp$ collisions, as the measured normalised eμe\mu differential distributions are better described by models incorporating these states than by standard perturbative QCD predictions.

ATLAS Collaboration2026-05-05⚛️ hep-ex