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.

Searching for Lepton Flavor Violating decays of the Higgs Boson into μτ\mu\tau, eτe\tau, and eμe\mu final states at FCC-ee

This paper investigates the projected sensitivity of the FCC-ee at s=240\sqrt{s}=240 GeV with 5 ab1^{-1} luminosity to Lepton Flavor Violating Higgs decays into μτ\mu\tau, eτe\tau, and eμe\mu final states, establishing 95% CL upper limits on their branching ratios and demonstrating that FCC-ee constraints surpass low-energy searches for the eτe-\tau and μτ\mu-\tau channels, while remaining less stringent for the eμe-\mu channel.

P. Sriling, N. Srimanobhas, P. Uttayarat, R. Uttho, V. Wachirapusitanand2026-06-01⚛️ hep-ex

Measurement of the cross-section for the production of a WW boson in association with bb-jets in $pp$ collisions at s=13\sqrt{s}=13 TeV with the ATLAS detector

Using 140 fb1^{-1} of 13 TeV proton-proton collision data collected by the ATLAS detector, this paper presents a measurement of the W+bW+b-jet production cross-section that achieves a relative precision twice as good as previous results and is consistent with next-to-leading-order QCD predictions.

ATLAS Collaboration2026-06-01⚛️ hep-ex

Deep-learning-based low-energy trigger algorithms for the Hyper-Kamiokande experiment

This paper demonstrates that deep-learning-based trigger algorithms, particularly a supervised neural network and an MPDR-based anomaly detection model, significantly outperform traditional hit-count triggers in identifying low-energy neutrino events for the Hyper-Kamiokande experiment while maintaining real-time feasibility with sub-millisecond GPU inference latencies.

Katharina Lachner, Saúl Alonso-Monsalve, Benjamin Richards, Davide Sgalaberna2026-06-01⚛️ hep-ex

CJ26 Global QCD Analysis with Large-xx Jefferson Lab 6 and 12 GeV Data

The CJ26 global QCD analysis presents a new set of NLO parton distribution functions by incorporating the complete suite of JLab 6 GeV and the first published 12 GeV data to uniquely disentangle higher-twist effects from off-shell nucleon corrections, thereby significantly reducing uncertainties in the large-xx n/pn/p structure function and d/ud/u valence quark ratios.

Alberto Accardi, Matteo Cerutti, Cynthia E. Keppel, Shujie Li, J. F. Owens, Sanghwa Park, Peter Risse2026-06-01⚛️ hep-lat

Resource-aware Research on Universe and Matter: Call-to-Action in Digital Transformation

Drawing from a May 2023 workshop, this paper calls for resource-aware research in the fields of Universe and Matter by outlining a portfolio of digital transformation measures designed to simultaneously advance scientific progress and mitigate climate change through reduced fossil fuel reliance.

Ben Bruers, Marilyn Cruces, Markus Demleitner, Guenter Duckeck, Michael Düren, Niclas Eich, Torsten Enßlin, Johannes Erdmann, Martin Erdmann, Peter Fackeldey, Christian Felder, Benjamin Fischer, Stefa (…)2026-05-29🔬 cond-mat.mtrl-sci

Search for the Higgs boson decay to a ZZ boson and a photon in $pp$ collisions at s=13\sqrt{s}=13 TeV and $13.6$ TeV with the ATLAS detector

Using 165 fb1^{-1} of 13.6 TeV proton-proton collision data recorded by the ATLAS detector and combining it with previous 13 TeV results, this study performs a search for the rare Higgs boson decay to a ZZ boson and a photon, finding a signal strength consistent with the Standard Model expectation with an observed significance of 2.5 standard deviations.

ATLAS Collaboration2026-05-29⚛️ hep-ex

Electromagnetic deflection effects in the integrated luminosity measurement at the CEPC

This paper quantifies the impact of electromagnetic deflection effects from incoming bunches on both initial and final state particles for integrated luminosity measurements at the CEPC's Z⁰ pole, while discussing their simulation-based characterization and potential experimental correction methods to achieve a relative precision of 10⁻⁴.

Ivan Smiljanić, Ivanka Božović, Ivana Vidaković, Nataša Vukašinović, Goran Kačarević2026-05-29⚛️ hep-ex

Search for long-lived particles using displaced vertices with low-momentum tracks in proton-proton collisions at s\sqrt{s} = 13 TeV

Using 100 fb1^{-1} of 13 TeV proton-proton collision data from the CMS experiment, this study presents a search for long-lived particles via displaced vertices with low-momentum tracks, setting the most stringent limits to date on top squark and wino-like neutralino masses in specific supersymmetric coannihilation scenarios.

CMS Collaboration2026-05-29⚛️ hep-ex