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

Improved aluminum film transport properties and enhanced TES response in athermal phonon detectors: implications for quasiparticle dynamics

This paper reports that improving the grain size and residual-resistivity ratio of patterned aluminum films in Quasiparticle-trap-assisted Electro-thermal-feedback Transition-edge-sensor (QET) detectors significantly enhances signal strength and phonon collection efficiency for dark matter and CEν\nuNS searches.

Mahdi Mirzakhani, Keith Hunter, Rupak Mahapatra, Mark Platt2026-10-19
⚛️ high-energy experiments

A comparative study of variational quantum classifiers and classical machine learning for tW−ttˉtW-t\bar{t} discrimination at the LHC

This study benchmarks the performance of Variational Quantum Classifiers against classical Boosted Decision Trees and Multi-Layer Perceptrons for discriminating tWtW signal from ttˉt\bar{t} background in LHC Run-2 data, identifying specific analysis regimes where quantum-inspired models offer competitive discrimination capabilities.

Rohan Hindocha, Priyanka2026-10-19
⚛️ high-energy experiments

Observation of the Ξb−→Ξ−μ+μ−{\Xi_b^-\to \Xi^-\mu^+\mu^-} and study of the Ξb−→Ξ−ψ(2S){\Xi_b^-\to\Xi^-\psi(2S)} decays

Using LHCb proton-proton collision data, this paper reports the first observation of the rare decay Ξb−→Ξ−μ+μ−\Xi_b^-\to\Xi^-\mu^+\mu^- with a measured branching fraction of (118±24±7±38)×10−8(118 \pm 24 \pm 7 \pm 38) \times 10^{-8} and provides a new measurement of the branching fraction ratio between Ξb−→Ξ−ψ(2S)\Xi_b^-\to\Xi^-\psi(2S) and Ξb−→Ξ−J/ψ\Xi_b^-\to\Xi^-J/\psi.

LHCb collaboration, R. Aaij, M. Abdelfatah, A. S. W. Abdelmotteleb, C. Abellan Beteta, F. Abudinén, T. Ackernley, A. A. (…)2026-10-19
⚛️ high-energy experiments

First measurement of flux of the neutron background induced by accelerated neutrinos at the J-PARC facility

This paper reports the first measurement of the neutron background flux induced by the accelerated neutrino beam at the J-PARC facility, determining a value of [1.45−0.24+0.22 (stat.)±0.55 (sys.)]×10−7 cm−2s−1POT−1[1.45^{+0.22}_{-0.24}~\rm{(stat.)} \pm 0.55~\rm{(sys.)}] \times 10^{-7}~\rm{cm}^{-2} \rm{s}^{-1}\rm{POT}^{-1} based on 88 observed events from a 2.972×10202.972 \times 10^{20} POT dataset, which is crucial for evaluating backgrounds in neutrino experiments.

Hiroshi Ito, Ryo Shibayama, Chisako Ise, Akihiro Minamino, Yusuke Koshio, Masaki Ishitsuka2026-10-19
⚛️ high-energy experiments

Internal energy of the medium formed in pp collisions

This paper employs a thermostatistical analysis of ALICE's charged particle data from LHC pp collisions to demonstrate that the internal energy of the produced medium exhibits nonlinear behavior, indicating a complex degree-of-freedom structure that departs from the ideal gas model and explains the persistent production of high-\pT\pT hadrons.

J. Alonso Tlali, D. Rosales Herrera, J. R. Alvarado García, A. Fernández Téllez, C. Pajares, J. E. Ramírez2026-10-16