2523 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.
This paper presents the first next-to-leading order calculation of and transition form factors using soft-collinear effective theory light-cone sum rules, deriving factorization formulae, isolating excited states from ground-state contamination, and providing phenomenological predictions for branching fractions and lepton flavor universality ratios.
Using 127 fb of 13 TeV proton-proton collision data collected via the CMS data scouting stream, this study searches for soft unclustered energy patterns predicted by hidden-valley models, finds no evidence beyond standard model backgrounds, and sets the most stringent limits to date on gluon fusion production of heavy scalar mediators.
Using ATLAS detector data from proton-proton collisions at 13 TeV and 13.6 TeV, this study searches for the rare Higgs boson decay to a Z boson and a photon, finding results consistent with Standard Model predictions with an observed significance of 2.5 standard deviations when combining datasets.
Based on 138 fb of proton-proton collision data at 13 TeV collected by the CMS experiment, this paper presents a combined statistical analysis of searches for heavy vector boson resonances that finds no deviation from the Standard Model and sets the most stringent constraints to date on the Heavy Vector Triplet model, excluding resonance masses up to 5.5 TeV depending on the coupling scenario.
Using 408 fb⁻¹ of data from the Belle II detector, researchers searched for axion-like particles decaying into two photons across a mass range of 0.17 to 9.80 GeV/c², found no significant excess, and established the most restrictive upper limits to date on the ALP-photon coupling for masses below 5.00 GeV/c².
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.
The AMoRE-I experiment analyzed 7.32 kgyr of exposure from thirteen CaMoO crystals to search for neutrinoless double electron capture in Ca, finding no significant signal and setting a lower half-life limit of years at 90% confidence level.
This paper outlines the critical challenges and opportunities facing early-career researchers in particle physics, emphasizing how long-term planning for future experiments directly impacts their careers while addressing key issues such as the job market, science outreach, and the role of artificial intelligence.
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.
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.