⚛️ Category

hep-ex

2101 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 the Higgs boson production in association with top quarks in multilepton final states in $pp$ collisions at s=13\sqrt{s}=13 TeV with the ATLAS detector

Using 140 fb−1^{-1} of 13 TeV proton-proton collision data collected by the ATLAS detector, this study measures the ttˉHt\bar{t}H production cross-section in multilepton final states, finding a signal strength of 0.63−0.19+0.200.63^{+0.20}_{-0.19} with 3.3σ\sigma observed significance, while also performing differential measurements, constraining tHtH production, and excluding large CPCP-odd mixing in the top-Higgs Yukawa coupling.

Atlas Collaboration2026-07-21
⚛️ high-energy experiments

Widen the Resonance at Ultra-High Energies: Novel Probes of Neutrino Self-interactions in the High-Mass Regime

This paper proposes a novel probe for neutrino self-interactions using ultra-high-energy neutrinos scattering off the cosmic neutrino background to "widen the resonance," enabling future telescopes like GRAND to explore mediator masses from MeV to GeV with couplings up to two orders of magnitude beyond current limits.

Pedro A. N. Machado, Isaac R. Wang, Xun-Jie Xu, Bei Zhou2026-07-21
⚛️ high-energy experiments

HEPTAPOD: Orchestrating High Energy Physics Workflows Towards Autonomous Agency

This paper introduces HEPTAPOD, an orchestration framework that integrates large language models into high-energy physics workflows to enable autonomous, multi-step task execution across theoretical calculations, simulations, and data analysis while maintaining transparency, reproducibility, and human oversight.

Tony Menzo, Alexander Roman, Sergei Gleyzer, Konstantin Matchev, George T. Fleming, Stefan Höche, Stephen Mrenna, Prasan (…)2026-07-21
⚛️ high-energy experiments

Exploring Higgs EFT in ttˉhht\bar{t}hh at High Luminosity LHC

This paper presents a detailed study of the non-resonant ttˉhht\bar{t}hh production process at the High-Luminosity LHC within the Higgs Effective Field Theory framework, utilizing both cut-based and multivariate analysis methods to derive the first sensitivity projections for several higher-dimensional couplings and demonstrate the channel's potential to probe extended Higgs and top-quark interactions beyond the Standard Model.

Ricardo D'Elia Matheus, Oscar J. P. Eboli, Rafiqul Rahaman, Aurore Savoy Navarro2026-07-21
⚛️ high-energy experiments

Measurement of the branching ratio of the K+→π+ννˉK^{+}\rightarrow\pi^{+}\nu\bar{\nu} decay

The NA62 experiment has measured the branching ratio of the rare decay K+→π+ννˉK^+\to\pi^+\nu\bar{\nu} using data from 2016 to 2024, obtaining a result of (9.6−1.8+1.9)×10−11(9.6^{+1.9}_{-1.8})\times10^{-11} with 20% relative precision that is consistent with Standard Model predictions.

NA62 Collaboration2026-07-21
⚛️ nuclear experiments

Study of χc\chi_{\mathrm{c}} production in pPb collisions at sNN\sqrt{s_{\mathrm{NN}}} = 8.16 TeV

This paper presents a study of prompt χc1\chi_{\mathrm{c1}} and χc2\chi_{\mathrm{c2}} production in pPb collisions at sNN\sqrt{s_{\mathrm{NN}}} = 8.16 TeV using CMS data, finding that their production ratio is independent of event multiplicity and kinematic variables, and shows no strong relative modification compared to proton-proton collisions, unlike the behavior observed for ψ\psi(2S) states.

CMS Collaboration2026-07-21
⚛️ high-energy experiments

First Observation of an Exotic Reggeon

This paper reports the first high-significance observation of an exotic Reggeon, likely associated with the π1(1600)\pi_1(1600), in the peripheral production of ηπ−\eta\pi^- and η′π−\eta^\prime\pi^- pairs based on new high-statistics COMPASS measurements and an unbinned high-mass analysis.

G. D. Alexeev (for JPAC Collaboration), M. G. Alexeev (for JPAC Collaboration), C. Alice (for JPAC Collaboration), A. Am (…)2026-07-21
⚛️ nuclear experiments

First measurement of Ξc0\mathbf{\rm \Xi_{\rm c}^{0}} production in Pb−Pb\mathbf{Pb}-\mathbf{Pb} collisions at sNN\mathbf{\sqrt{\textit{s}_{\rm NN}}} = 5.02 TeV

The ALICE Collaboration reports the first measurement of prompt Ξc0\Xi_{\mathrm c}^{0} baryon production in Pb-Pb collisions at sNN=5.02\sqrt{s_{\mathrm{NN}}} = 5.02 TeV, revealing a nuclear modification factor reaching up to 3 and yield ratios that challenge current theoretical models of charm hadronization in the quark-gluon plasma.

ALICE Collaboration2026-07-21