1495 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 a sub-part-per-trillion precision measurement of the 2S-6P transition in atomic hydrogen that resolves discrepancies in the proton charge radius by confirming the muonic hydrogen value and validates the Standard Model and bound-state QED corrections to unprecedented levels of accuracy.
This paper demonstrates that likelihood-free Simulation-Based Inference, particularly the Neural Posterior Estimation method, offers a computationally efficient and accurate alternative to traditional MCMC for exploring high-dimensional Beyond the Standard Model parameter spaces, successfully inferring posterior distributions for both 5-parameter and 9-parameter pMSSM scenarios including dark matter constraints.
Using a sample of 2.7 billion events collected by the BESIII detector, this study reports the first observation of the decay via the intermediate state, measures its associated branching fraction, observes an isospin-violating decay involving the , and sets upper limits on production in these channels.
Using LHCb data corresponding to 9 fb⁻¹ of integrated luminosity, this paper reports the first observation of the decay and evidence for the decay, providing the first measurements of their branching fractions to advance the theoretical understanding of two-body baryonic meson decays.
This review examines a decade of theoretical and experimental advancements in muon physics, highlighting global efforts to enhance sensitivity in studying muon decays, magnetic and electric dipole moments, and charged lepton flavor violation to probe New Physics scenarios and guide future facility proposals.
This paper establishes a new benchmark for heavy-quark TMD resummation at the LHC by developing a framework that combines SCET and HQET to achieve NNLL' accuracy for the azimuthal decorrelation of boosted top quark pairs, a feat made possible by the first extraction of the two-loop ultra-collinear function.
This paper demonstrates that Big Bang nucleosynthesis constraints on GeV-scale heavy neutral leptons within the neutrino-extended Standard Model Effective Field Theory provide a crucial upper bound on the theory's cutoff scale for masses above 100 MeV, thereby defining specific target regions for future laboratory searches.
This report summarizes recent differential top quark cross-section measurements from the ATLAS and CMS experiments, highlighting that while no single theoretical model fully describes the data across all bins, higher-order perturbative QCD predictions offer an improved description.
This paper proposes a mass-varying scenario coupling active and sterile neutrinos to a scalar field, which generates keV-scale sterile neutrino dark matter while simultaneously alleviating the Hubble tension and offering a parameter space fully testable by future X-ray missions.
This paper proposes a minimalistic model containing four scalar multiplets to simultaneously explain multiple excesses observed at the LHC (notably at 95 GeV and 650 GeV), arguing that these hints disfavor common scalar extensions while predicting specific charged scalars that make the theory testable and falsifiable despite current data limitations.