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

Transformer-Based Pulse Shape Discrimination in HPGe Detectors with Masked Autoencoder Pre-training

This paper demonstrates that transformer-based models, particularly when enhanced by masked autoencoder pre-training, outperform traditional gradient-boosted decision trees in pulse-shape discrimination and energy regression for HPGe detectors by leveraging full waveform data and significantly reducing the need for labeled training samples.

Marta Babicz, Saúl Alonso-Monsalve, Alain Fauquex, Laura Baudis2026-03-09
⚛️ phenomenology

Latin American HECAP Physics Briefing Book 2025

This paper presents the updated 2025 Physics Briefing Book for the Latin American Strategy Forum for Research Infrastructure in High Energy, Cosmology, and Astroparticle Physics (LASF4RI-HECAP), which synthesizes 46 community white papers and symposium discussions to establish a long-term strategic roadmap across seven key scientific and technical working groups.

Mario A. Acero (U. del Atlántico - Colombia), Alexis A. Aguilar-Arevalo (UNAM - México), Belén Andrada (CNEA/CONICET/UNS (…)2026-03-09
⚛️ high-energy experiments

Modern jet flavour tagging in hadronic Z decays with archived ALEPH data

This paper presents a reanalysis of archived ALEPH LEP data using modern deep learning-based jet flavour tagging techniques, which significantly improve the separation of b-, c-, and s-quark jets compared to legacy algorithms and demonstrate successful data calibration, thereby enabling more precise electroweak measurements and guiding future collider detector development.

Matteo M. Defranchis, Jacopo Fanini, Apranik Fatehi, Gerardo Ganis, Taj Gillin, Loukas Gouskos, Luka Lambrecht, Michele (…)2026-03-09
⚛️ phenomenology

Current status of the light neutralino thermal dark matter in the phenomenological MSSM

This paper reaffirms the robustness of strong experimental constraints on light neutralino thermal dark matter within the phenomenological MSSM, explores the impact of light staus and non-standard cosmology, and proposes machine learning-optimized benchmarks for future LHC Run-3 searches.

Rahool Kumar Barman, Genevieve Bélanger, Biplob Bhattacherjee, Rohini Godbole, Rhitaja Sengupta2026-03-06
⚛️ phenomenology

Long-lived Light Mediators in a Higgs Portal Model at the FCC-ee

This study evaluates the potential of the IDEA detector at the FCC-ee, alongside proposed dedicated LLP detectors like DELIGHT B, to detect long-lived particles arising from Higgs and B-meson decays within a Higgs portal model, finding that cylindrical configurations and DELIGHT B offer enhanced sensitivity against Standard Model backgrounds.

Biplob Bhattacherjee, Camellia Bose, Herbi K. Dreiner, Nivedita Ghosh, Shigeki Matsumoto, Rhitaja Sengupta2026-03-06
🔬 physics

Constraints on new physics from decays of polarized Λb0Λ_b^0 baryons at the FCC-ee

This paper demonstrates that utilizing the unique polarization of Λb0\Lambda_b^0 baryons produced in Z0Z^0 decays at the FCC-ee, despite comparable statistical sensitivity to LHCb Upgrade II for individual observables, significantly improves constraints on the Wilson coefficients C9()C_{9^{(\prime)}} and C10()C_{10^{(\prime)}} through a broader set of accessible angular observables.

Anja Beck, Mero Elmarassy, Asher Sabbagh, Michal Kreps, Eluned Smith2026-03-06
🔬 physics

Measurements of differential charged-current cross sections on argon for electron neutrinos with final-state protons in MicroBooNE

The MicroBooNE collaboration presents the first single-differential electron-neutrino charged-current cross-section measurements on argon with final-state protons, reporting a total cross section of [4.1±0.3 (stat.)±1.1 (syst.)]×1039cm2/nucleon[4.1 \pm 0.3 \text{ (stat.)} \pm 1.1 \text{ (syst.)}] \times 10^{-39} \mathrm{cm}^{2}/\mathrm{nucleon} that shows good agreement with standard neutrino event generator predictions.

MicroBooNE collaboration, P. Abratenko, D. Andrade Aldana, L. Arellano, J. Asaadi, A. Ashkenazi, S. Balasubramanian, B. (…)2026-03-06