⚛️ Category

hep-ex

1387 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.

Valence quark-stopping and gluon junction-stopping scenarios in electron-nucleus collisions at the forthcoming Electron-Ion Collider: Which one is correct?

Using a multi-source thermal model, this paper argues that the valence quark-stopping scenario is more suitable than the gluon junction scenario for explaining baryon number transport in high-energy collisions, a conclusion that can be further validated by future electron-nucleus collision experiments at the Electron-Ion Collider.

Ting-Ting Duan, Fu-Hu Liu, Khusniddin K. Olimov2026-04-17⚛️ nucl-ex

Effects of tau-neutrino detection on non-standard interactions at DUNE with a short discussion on the nature of neutrino mixing

This paper demonstrates that detecting tau neutrinos at the DUNE far detector significantly enhances sensitivity to Non-Standard Interactions, particularly the ϵμτ\epsilon_{\mu\tau} parameter, while also improving constraints on mass hierarchy, CP violation, mixing octants, and the unitarity of the PMNS matrix.

Xin Yue Yu, Zishen Guan, William Dallaway, Ushak Rahaman, Nikolina Ilic2026-04-17⚛️ hep-th

Prospects for toponium formation at the LHC in the single-lepton mode

This paper investigates toponium formation in the single-lepton channel at the LHC using a novel framework that integrates non-perturbative effects into Monte Carlo simulations, demonstrating that a statistically significant signal could be accessible in Run 2 data and establishing this channel as a competitive avenue for future exploration.

Benjamin Fuks, Kaoru Hagiwara, Kai Ma, Léandre Munoz-Aillaud, Ya-Juan Zheng2026-04-17⚛️ hep-ex

NuGraph2 with Context-Aware Inputs: Physics-Inspired Improvements in Semantic Segmentation

This paper demonstrates that enriching the NuGraph2 architecture with physics-inspired, context-aware input features significantly improves semantic segmentation for underrepresented particles like Michel electrons in Liquid Argon Time Projection Chambers, outperforming auxiliary decoders and energy-based regularization due to the model's current hit-level limitations.

Vitor F. Grizzi, Margaret Voetberg, V Hewes, Giuseppe Cerati, Hadi Meidani2026-04-17⚛️ hep-ex

Observation of a threshold enhancement in the π+π−\pi^+\pi^- spectrum in ψ(3686)→π+π−J/ψ\psi(3686) \rightarrow \pi^{+}\pi^{-}J/\psi decays

Using a large sample of ψ(3686)\psi(3686) events collected by the BESIII detector, researchers discovered a statistically significant resonance-like structure near the π+π−\pi^+\pi^- mass threshold that is well-described by a QCD multipole expansion model incorporating S-D wave mixing, while standard chiral perturbation theory fails to reproduce this enhancement.

BESIII Collaboration, M. Ablikim, M. N. Achasov, P. Adlarson, X. C. Ai, R. Aliberti, A. Amoroso, Q. An, Y. Bai, O. Bakina, Y. Ban, H. -R. Bao, V. Batozskaya, K. Begzsuren, N. Berger, M. Berlowski, M. (…)2026-04-17⚛️ hep-ex

Observation of Λˉp→K+π+π−π0\bar{\Lambda}p\to K^{+}\pi^{+}\pi^{-}\pi^{0} and Λˉp→K+π+π−2π0\bar{\Lambda}p\to K^{+}\pi^{+}\pi^{-}2\pi^{0}

Using a sample of J/ψJ/\psi events collected by the BESIII detector, this study reports the first observation of the antihyperon-nucleon annihilation processes Λˉp→K+π+π−π0\bar{\Lambda} p \to K^+ \pi^+ \pi^- \pi^0 and Λˉp→K+π+π−2π0\bar{\Lambda} p \to K^+ \pi^+ \pi^- 2\pi^0, measures their cross sections, and provides evidence for the K∗(892)+K^{*}(892)^+ resonance in the K+π0K^+\pi^0 spectrum.

BESIII Collaboration, M. Ablikim, M. N. Achasov, P. Adlarson, X. C. Ai, C. S. Akondi, R. Aliberti, A. Amoroso, Q. An, Y. H. An, Y. Bai, O. Bakina, Y. Ban, H. -R. Bao, X. L. Bao, V. Batozskaya, K. Begz (…)2026-04-17⚛️ nucl-ex

Search for heavy resonances decaying into four-lepton final states via light bosons in proton-proton collisions at s\sqrt{s} = 13 TeV

Using 138 fb−1^{-1} of 13 TeV proton-proton collision data from the CMS experiment, this study presents a search for heavy resonances decaying into four leptons via light intermediate bosons, employing novel techniques to identify collimated dilepton pairs and setting upper limits on the production cross section in the previously unexplored dilepton mass range of 0.4–15 GeV without observing any significant excess over background predictions.

CMS Collaboration2026-04-17⚛️ hep-ex