1442 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.
Using proton-proton collision data from the LHCb experiment, researchers have observed the charmless purely baryonic decay with a significance of 5.1 standard deviations and measured its branching fraction relative to for the first time.
This work investigates the production of - and -bound states in decays using the Bethe-Salpeter framework and the one-boson-exchange model, finding that while -bound states exist across all coupling sets, -bound states are restricted to specific parameter ranges, with predicted branching ratios in the range of to .
This article examines the realization of spontaneous CP violation within a supersymmetric theory, demonstrating how this resolves the strong CP problem, generates the CKM phase, and successfully explains the baryon asymmetry of the universe via the Affleck-Dine mechanism, while simultaneously predicting a measurable electric dipole moment for the neutron.
Using 1.93 nb of Pb+Pb collision data at TeV, the ATLAS collaboration presents the first differential fiducial measurements of production and extracts constraints on the -lepton's anomalous magnetic and electric dipole moments, marking the first time the latter has been measured in heavy-ion collisions.
This article proposes two TeV-scale singlet-doublet dark matter models (Majorana and Dirac) that simultaneously explain the origin of radiative neutrino masses, the baryon asymmetry of the universe via leptogenesis, and the dark matter relic density, while offering testable signatures for collider experiments and cosmology.
This contribution presents an extended plain-text syntax for Geant4 that integrates optical properties via new ":prop" and ":surf" tags, enabling users to configure and execute complex optical simulations without writing C++ code.
This contribution presents updated theoretical predictions for the lifetimes of all weakly decaying doubly heavy baryons ($bb$, $cc$, $bc$) as well as the meson by incorporating higher-order QCD corrections, comparing various mass schemes, and establishing specific lifetime hierarchies for different ground-state spin configurations.
This paper analyzes the evolution of collected charge and depletion voltage in ATLAS IBL planar pixel sensors over a decade of LHC operation, correlating radiation-induced performance degradation with particle fluence using experimental bias scans and validated TCAD/Monte Carlo simulations.
Using the dynamic diquark model with a Born-Oppenheimer potential derived from lattice QCD, this study predicts that the doubly heavy scalar tetraquark lies near the threshold as a potential bound state or narrow resonance, while the axial-vector state is a compact -wave resonance situated approximately 23–28 MeV above the threshold.
Using 428 fb of data from the Belle II experiment, the authors performed a search for charged-lepton-flavor-violating decays and established the most stringent upper limits to date on their branching fractions, ranging from $1.3$ to at the 90% confidence level.