⚛️ Category

hep-ex

2131 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.

⚛️ nuclear experiments

Twist-2 relations for the twist-3 tensor-polarized distribution function fLTf_{LT} of a spin-1 hadron by the operator-product-expansion method

This paper employs the local operator-product-expansion method to independently derive twist-2 relations, specifically a Wandzura-Wilczek-like relation and a Burkhardt-Cottingham-like sum rule, for the twist-3 tensor-polarized distribution function fLTf_{LT} of spin-1 hadrons, thereby providing a robust theoretical foundation for upcoming electron-deuteron deep inelastic scattering experiments at JLab.

S. Kumano, Kenshi Kuroki2026-05-04
⚛️ high-energy experiments

Observation of the rare decay η\eta →\to μ+μ−\mu^+\mu^-e+^+e−^-

The CMS Collaboration reports the first observation of the rare decay η→μ+μ−e+e−\eta \to \mu^+\mu^-e^+e^- using 13.6 TeV proton-proton collision data, measuring a branching fraction of (2.4±0.8)×10−6(2.4 \pm 0.8) \times 10^{-6} that aligns with theoretical predictions and significantly improves upon previous limits.

CMS Collaboration2026-05-04
⚛️ high-energy experiments

Low-Energy Nuclear Recoil Calibration of XENONnT with a 88^{88}YBe Photoneutron Source

The XENONnT experiment successfully utilized a 88^{88}YBe photoneutron source to calibrate low-energy nuclear recoil light and charge yields in liquid xenon, providing essential data for solar neutrino measurements and searches for light dark matter particles.

XENON Collaboration, E. Aprile, J. Aalbers, K. Abe, S. Ahmed Maouloud, L. Althueser, B. Andrieu, E. Angelino, D. Antón M (…)2026-05-01
⚛️ high-energy experiments

Prospects of searches for invisible BB-meson decays at FCC-ee

This paper investigates the physics potential of the FCC-ee collider to detect invisible BB-meson decays, demonstrating that with 6×10126\times 10^{12} produced ZZ bosons, the experiment could exclude branching fractions above 7.6×10−97.6\times 10^{-9} and potentially discover signals up to 3.0×10−83.0\times 10^{-8} using a multipurpose detector and advanced classification techniques.

P. Alvarez Cartelle, M. Kenzie, R. Mangrulkar, A. R. Wiederhold, E. Wood2026-05-01
⚛️ high-energy experiments

Muonphilic asymmetric dark matter at a future muon collider

This paper investigates phenomenological constraints and future discovery potential for muonphilic portals to fermionic asymmetric dark matter, analyzing both effective field theory operators and specific Lμ−LτL_\mu - L_\tau UV models to determine how 3 and 10 TeV muon colliders can probe parameter spaces currently allowed by direct detection, collider limits, and muon g−2g-2 anomalies.

Arnab Roy, Raymond R. Volkas2026-05-01✓ Author reviewed ⓘ
⚛️ high-energy experiments

First evidence of the Bs0→K−π+γB_s^0\rightarrow K^-\pi^+\gamma decay

This paper reports the first search for the Bs0→K−π+γB_s^0\rightarrow K^-\pi^+\gamma decay within the invariant mass range of $796$ to 1800 MeV/c21800\,\text{MeV/}c^2, resulting in a measured ratio of R=(0.2±2.7±1.3)×10−2{\cal R} = (0.2\pm2.7\pm1.3)\times10^{-2} and no significant evidence of the decay.

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb, C. Abellan Beteta, F. Abudinén, T. Ackernley, A. A. Adefisoye, B. A (…)2026-05-01