1376 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 365 fb⁻¹ of data collected by the Belle II experiment, this paper presents measurements of branching fractions and CP asymmetries for decays, yielding results that are consistent with world-average values and theoretical predictions.
This paper presents a comprehensive analysis demonstrating that future electron-positron and proton-proton colliders offer an order-of-magnitude improvement in sensitivity to anomalous CP-violating interactions in the gauge-Higgs sector compared to the high-luminosity LHC, thereby providing crucial insights into new physics sources for the observed matter-antimatter asymmetry.
This paper proposes and validates a method using Pythia 8.3 simulations to isolate the top-quark dead cone effect in decays by extrapolating hadronic momentum distributions to the forward direction, thereby successfully separating primary top radiation from secondary -quark radiation to test perturbative QCD in a new kinematic regime.
This paper presents a unified framework for studying the QCD dead-cone effect across charm, bottom, and top quark jets by combining precision LEP data with Monte Carlo simulations to validate momentum-space suppression in lighter heavy quarks and proposing a novel method to isolate the dead cone in top-quark jets despite finite lifetime and decay radiation challenges.
Using a combined dataset of over 1.29 billion decays from the Belle and Belle II experiments, researchers report the first observation of the -meson decays and with statistical significances of and , respectively, and measure their branching fractions.
This paper demonstrates that an optimized multi-stage sweeper magnet system, simulated using a framework combining SIBYLL, BDSIM, and Geant4, can effectively reduce the forward muon background at the Forward Physics Facility from to per , thereby mitigating a major challenge for neutrino detection at the HL-LHC.
This paper investigates how various damping mechanisms, including wave packet decoherence and invisible neutrino decay, impact neutrino oscillations, demonstrating that the first JUNO data can simultaneously provide competitive constraints on these non-standard effects while maintaining robust measurements of standard oscillation parameters.
This paper presents AgentRivet, an automated workflow utilizing Large Language Models to extract physics analysis details from journal publications and generate Rivet routines, thereby addressing the significant gap in coverage for model-independent measurements in particle physics.
MicroBooNE reports the first measurement of the charged-current coherent pion production cross section on argon at sub-GeV neutrino energies, yielding a flux-averaged value of that offers a valuable tool for constraining neutrino flux uncertainties in future oscillation experiments like DUNE.
The QUAX experiment utilized a quantum-limited tunable microwave receiver to scan a frequency range around 10.2 GHz, successfully ruling out viable hadronic axion models in the preferred post-inflationary mass region above 40 μeV by finding no signal candidates.