⚛️ Category

hep-ex

2101 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

Impact of QED Radiation on SMEFT Constraints in Deep Inelastic Scattering

This paper investigates how collision-induced QED radiation affects Standard Model Effective Field Theory (SMEFT) constraints in deep-inelastic scattering, revealing that while cross sections undergo significant order-one corrections, longitudinal electron spin asymmetries remain robust at the few-percent level, thereby offering a more reliable observable for future precision studies at facilities like SoLID and the Electron-Ion Collider.

Sonny Mantry, Jian-Wei Qiu, Jia-Yue Zhang2026-07-10
⚛️ nuclear experiments

A study of neutrinoless double electron capture in 40^{40}Ca from the AMoRE experiment

The AMoRE-I experiment analyzed 7.32 kg⋅\cdotyr of exposure from thirteen 40^{40}Ca100^{100}MoO4_4 crystals to search for neutrinoless double electron capture in 40^{40}Ca, finding no significant signal and setting a lower half-life limit of 1.7×10221.7 \times 10^{22} years at 90% confidence level.

AMoRE Collaboration, A. Agrawal, V. V. Alenkov, P. Aryal, J. Beyer, B. Bhandari, R. S. Boiko, K. Boonin, O. Buzanov, C. (…)2026-07-10
⚛️ high-energy experiments

Precision three-Dimensional Atmospheric Neutrino Flux Calculation Based on Honda Flux Model

This paper presents a comprehensive three-dimensional atmospheric neutrino flux calculation covering 10 MeV to 10 TeV across seven detector sites, incorporating novel muon propagation effects and updated input models to provide precise, site-dependent flux predictions with reduced systematic uncertainties for current and future neutrino and dark matter experiments.

Jie Cheng, Yu-Feng Li, Liang-Jian Wen2026-07-10
⚛️ high-energy experiments

The 20 GeV Galactic Halo Excess: Pixel-Level Confirmation and Consistency with Sub-TeV WIMP Annihilation

This paper confirms a 20 GeV gamma-ray excess in the Galactic halo using pixel-level analysis of Fermi-LAT data, finding it consistent with sub-TeV WIMP annihilation but requiring a low-velocity-enhanced mechanism, such as resonant Sommerfeld or Breit-Wigner effects, to reconcile the signal with dwarf spheroidal galaxy constraints and relic density requirements.

Trinity Rosebud Stenhouse, Chamkaur Ghag, Frank F. Deppisch2026-07-10
⚛️ high-energy experiments

Directional Search for Persistent Gravitational Waves: Results from the First Part of LIGO-Virgo-KAGRA's Fourth Observing Run

Using data from the first part of LIGO-Virgo-KAGRA's fourth observing run, this study employs directional radiometer techniques to find no evidence of persistent gravitational-wave signals, thereby establishing the most stringent constraints to date on the strain amplitude and flux of narrowband, broadband, and extended sources across the sky.

The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration, A. G. Abac, I. Abouelfettouh, F. Ac (…)2026-07-09
⚛️ high-energy experiments

Amplitude analysis and branching fraction measurement of J/ψ→ΛΣˉ0η+c.cJ/ψ\to Λ\barΣ^0η+\mathrm{c.c}

Using a large sample of J/ψJ/\psi events collected by the BESIII detector, this study performs the first partial-wave analysis of the decay J/ψ→ΛΣˉ0η+c.c.J/\psi\to \Lambda\bar{\Sigma}^0\eta+\mathrm{c.c.}, identifying dominant contributions from excited Λ\Lambda states (Λ(1670)\Lambda(1670) and Λ(1810)\Lambda(1810)) and measuring their masses, widths, and the process's branching fraction.

BESIII Collaboration, M. Ablikim, M. N. Achasov, P. Adlarson, X. C. Ai, C. S. Akondi, R. Aliberti, A. Amoroso, Q. An, Y. (…)2026-07-09
⚛️ high-energy experiments

High-Energy Neutrino Tomography of the Earth's Interior with IceCube

Using 10.7 years of high-energy neutrino data from the IceCube Neutrino Observatory, researchers successfully reconstructed the Earth's radial density profile and derived its mass and moment of inertia, providing the most precise weak-interaction measurements of these planetary properties to date and demonstrating neutrinos as a novel, complementary probe of Earth's interior alongside traditional seismological and gravitational methods.

The IceCube Collaboration, R. Abbasi, M. Ackermann, J. Adams, J. A. Aguilar, M. Ahlers, J. M. Alameddine, S. Ali, N. M. (…)2026-07-09