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

Probing EFT breakdown in the tails of W+W−W^+ W^- observables

This paper demonstrates that clipping Effective Field Theory (EFT) simulations at the new physics scale Λ\Lambda via an invariant mass cut (MWW<ΛM_{WW} < \Lambda) is insufficient to guarantee EFT validity across different observables and operator orders, while also highlighting the risks of introducing model-dependent form factors and proposing alternative transverse mass cuts for more robust sensitivity studies.

Daniel Gillies, Andrea Banfi, Adam Martin2026-01-28
⚛️ high-energy experiments

Optimisation of the vertex detector and measurement of Higgs decays to second-generation quarks at the CEPC

This study utilizes an AI-driven Jet Origin Identification framework to demonstrate that optimizing the vertex detector's inner radius and spatial resolution at the CEPC significantly enhances the precision of measuring Higgs decays to second-generation quarks, particularly H→ssˉH \to s\bar{s}.

Jialin Li, Liang Hao, Kaili Zhang, Yifan Zhu, Jun Guo, Haijun Yang, Manqi Ruan2026-01-27
⚛️ high-energy experiments

First exclusive reconstruction of the B∗+^{*+}, B∗0^{*0}, and Bs∗0^{*0}_\text{s} mesons and precise measurement of their masses

Using 140 fb−1^{-1} of proton-proton collision data at 13 TeV, the CMS experiment achieved the first full exclusive reconstruction of the B∗+^{*+}, B∗0^{*0}, and Bs∗0^{*0}_\text{s} mesons, measuring their mass differences with a precision improved by an order of magnitude compared to previous results.

CMS Collaboration2026-01-27
⚛️ nuclear experiments

Design and development of optical modules for the BUTTON-30 detector

This paper details the design and construction of the watertight optical modules for BUTTON-30, a neutrino detector demonstrator located in the STFC Boulby underground facility that aims to test gadolinium-loaded water-based liquid scintillator for future large-volume observatories and nuclear reactor monitoring.

D. S. Bhattacharya, J. Bae, M. Bergevin, J. Boissevain, S. Boyd, K. Bridges, L. Capponi, J. Coleman, D. Costanzo, T. Cun (…)2026-01-27
⚛️ nuclear theory

Accessing baryon-antibaryon generalized distribution amplitudes in e±γ→e±BBˉe^{\pm} γ\to e^{\pm} B \bar{B}

This paper investigates the feasibility of extracting baryon-antibaryon generalized distribution amplitudes from the e±γ→e±BBˉe^\pm \gamma \to e^\pm B \bar{B} process using QCD factorization and numerical estimates, demonstrating that such a measurement is achievable at the Belle II experiment.

Jing Han, Bernard Pire, Qin-Tao Song2026-01-27