⚛️ Category

hep-ex

1327 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.

Measurement of charged-hadron distributions in heavy-flavor jets in proton-proton collisions at s\sqrt{s}=13 TeV

The LHCb collaboration measured charged-hadron distributions in beauty and charm jets from 13 TeV proton-proton collisions, observing differences consistent with the dead-cone effect and hard fragmentation that provide new constraints on heavy-flavor hadronization mechanisms.

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb, C. Abellan Beteta, F. Abudinén, T. Ackernley, A. A. Adefisoye, B. Adeva, M. Adinolfi, P. Adlarson, C. Agapopoulou, C. A. Aidala, Z. Ajaltouni, S. (…)2026-04-24⚛️ hep-ex

Precision Measurements of Higgs Hadronic Decay Modes at the FCC-ee

This paper presents a comprehensive study of the expected precision for Higgs boson hadronic decay modes (bbˉ,ccˉ,ssˉ,ggb\bar{b}, c\bar{c}, s\bar{s}, gg) at the FCC-ee, demonstrating that combining $ZH$ and Vector boson fusion processes with four IDEA detectors will achieve percent-to-per-mil level measurements and provide the first sensitivity to evidence the rare H→ssˉH\rightarrow s\bar{s} decay.

Andrea Del Vecchio, Jan Eysermans, Loukas Gouskos, George Iakovidis, Alexis Maloizel, Giovanni Marchiori, Michele Selvaggi2026-04-24🔬 physics.app-ph

Searching for EeV photons with Telescope Array Surface Detector and neural networks

Using 14 years of Telescope Array Surface Detector data and a neural network classifier fine-tuned on experimental data to distinguish between proton- and photon-induced events, the study reports no significant photon candidates and establishes an updated upper limit on the diffuse ultra-high-energy photon flux above 101910^{19} eV of 3.0⋅10−4 (km2⋅sr⋅yr)−13.0 \cdot 10^{-4} \, (\text{km}^2 \cdot \text{sr} \cdot \text{yr})^{-1}.

Telescope Array Collaboration, R. U. Abbasi (Institute for Cosmic Ray Research, University of Tokyo, Kashiwa, Chiba 277-8582, Japan), T. Abu-Zayyad (Institute for Cosmic Ray Research, University of To (…)2026-04-24⚛️ hep-ex

Precision measurement of CP violation and branching fractions in B±→KS0h±B^{\pm} \to K^0_{\mathrm{S}} h^{\pm} (h=π,K)(h = \pi, K) decays and search for the rare decay Bc±→KS0K±B_c^{\pm} \to K^0_{\mathrm{S}} K^{\pm}

Using 13 TeV proton-proton collision data from the LHCb experiment, this study presents the most precise measurements to date of CP asymmetries and the branching fraction ratio for B±→KS0π±B^{\pm} \to K^0_{\mathrm{S}} \pi^{\pm} and B±→KS0K±B^{\pm} \to K^0_{\mathrm{S}} K^{\pm} decays, while also setting upper limits on the rare Bc±→KS0K±B_c^{\pm} \to K^0_{\mathrm{S}} K^{\pm} decay.

R. Aaij, A. S. W. Abdelmotteleb, C. Abellan Beteta, F. Abudinén, T. Ackernley, A. A. Adefisoye, B. Adeva, M. Adinolfi, P. Adlarson, C. Agapopoulou, C. A. Aidala, Z. Ajaltouni, S. Akar, K. Akiba, M. (…)2026-04-24⚛️ hep-ex

Sharpening New Physics Searches in Neutrino Oscillations with DUNE-PRISM

This paper demonstrates that the DUNE-PRISM technique, which utilizes measurements at multiple off-axis angles to mitigate flux and cross-section systematic uncertainties, significantly restores the sensitivity of the DUNE experiment to new physics scenarios like non-unitarity and sterile neutrinos in the electron and muon sectors, while providing high-statistics flux data for future analyses.

Josu Hernández-García, Jacobo López-Pavón, Salvador Urrea2026-04-24⚛️ hep-ph

Kitchen Sink Anomaly Detection

This paper addresses limitations in existing resonant anomaly detection methods by introducing new simulated signal benchmarks and a comprehensive "kitchen sink" observable set combining Energy Flow Polynomials and subjettiness variables, demonstrating that this approach offers superior sensitivity across diverse signal types while an attribute bagging variant significantly reduces training costs with comparable performance.

Ranit Das, Marie Hein, Gregor Kasieczka, Michael Krämer, Lukas Lang, Radha Mastandrea, Louis Moureaux, Alexander Mück, David Shih2026-04-24⚛️ hep-ph

Search for dark matter produced in association with a dark Higgs boson decaying into a bottom quark-antiquark pair in proton-proton collisions at s\sqrt{s} = 13 TeV

Using 138 fb−1^{-1} of proton-proton collision data at 13 TeV collected by the CMS detector, this study sets the most stringent limits to date on dark matter production associated with a dark Higgs boson decaying into a bottom quark-antiquark pair, excluding mediator masses up to 4.5 TeV for specific dark Higgs mass hypotheses.

CMS Collaboration2026-04-24⚛️ hep-ex

Masked-Token Prediction for Anomaly Detection at the Large Hadron Collider

This paper introduces the first application of masked-token prediction, a technique adapted from Large Language Models, to anomaly detection at the Large Hadron Collider, demonstrating that a lightweight transformer trained solely on Standard Model background events can effectively identify rare new-physics signals through deviations in learned data structures.

Ambre Visive, Roberto Ruiz de Austri, Polina Moskvitina, Clara Nellist, Sascha Caron2026-04-24⚛️ hep-ph