1483 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 a dataset of 428 fb collected by the Belle II experiment, researchers measured the time- and phase-space-integrated $CP$ asymmetry in decays to be , which represents the most precise result to date and is consistent with $CP$ conservation.
This paper presents next-to-next-to-leading order (NNLO) QCD evaluations of proton and pion mass decompositions using gravitational form factors, comparing standard quark/gluon and trace-anomaly breakdowns with a novel twist-two/twist-four separation to demonstrate its advantages and reveal distinct parton-correlation behaviors between the two hadrons.
Using 138 fb of 13 TeV proton-proton collision data collected by the CMS experiment, this study characterizes the quantum state of top quark-antiquark pairs by measuring spin correlations in the beam and helicity bases to decompose the system into Bell and spin eigenstates and evaluate properties like purity, entropy, and entanglement, with all results aligning with Standard Model predictions.
This paper implements next-to-leading order QCD corrections for the process within the ggxy framework, augmented with leptonic decays and an interface to POWHEG to enable parton shower simulations using Pythia.
This paper introduces a differentiable, multi-scale Effective Field Theory framework that integrates renormalization-group evolution, matching, and experimental constraints to enable efficient gradient-based inference in large parameter spaces, as demonstrated through comprehensive 374-parameter SMEFT analyses.
This paper extends previous bounds on the axion-photon coupling by over an order of magnitude using the SACLA X-ray free electron laser and the Borrmann effect in Laue crystals, achieving the most stringent laboratory constraints to date for QCD axions in the 3.46–3.48 keV mass range.
This paper proposes installing a dedicated liquid hydrogen or liquid deuterium target within the BESIII detector to significantly enhance the statistical precision of (anti)hyperon-nucleon and antineutron-nucleon interaction measurements, thereby advancing the understanding of non-perturbative strong interactions.
Using the full Run 2 and early Run 3 datasets from the ATLAS detector, this study searches for direct top squark pair production in events with two oppositely charged leptons, -jets, and missing transverse momentum, finding no significant excess over Standard Model predictions and setting improved 95% confidence level mass limits of up to 1060 GeV for top squarks and 560 GeV for neutralinos.
This report details the results of a survey conducted by the ECFA Early-Career Researchers Panel to assess the accessibility and quality of training programs in software and machine learning for instrumentation, aiming to guide improvements for early-career researchers in experimental physics.
This paper proposes a framework combining lattice QCD inputs with first-order symmetry breaking to predict specific branching ratio measurements for semileptonic decays that can definitively determine whether the observed large symmetry breaking stems from unexpected hadronic mechanisms or new physics.