1434 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 an extension of the MadGraph5_aMC@NLO framework that enables automated leading-order calculations for S-wave quarkonium and leptonium production within NRQCD and NRQED formalisms, offering seamless integration with Beyond the Standard Model scenarios and highlighting the necessity of careful theoretical analysis beyond simple velocity-scaling rules.
This study systematically investigates the gravitational wave emission from a population of millisecond pulsars proposed to explain the Galactic Center GeV gamma-ray excess, concluding that while current detectors cannot observe them, next-generation instruments like the Einstein Telescope and Cosmic Explorer may detect these signals to definitively test the pulsar versus dark matter interpretations of the excess.
This paper analyzes the production of pairs in collisions via continuum mechanisms and resonances, concluding that the observed 3.8 GeV bump in the channel is likely of continuum origin rather than a broad resonance, while also providing branching fraction estimates and cross-section predictions for the state relevant to Belle II experiments.
This paper proposes a gauged model featuring nearly degenerate Majorana dark matter that naturally resolves small-scale structure anomalies through self-interactions, accommodates the muon anomaly, and satisfies stringent constraints from the latest LZ 2025 direct detection data.
Using dijet-hadron correlations in lead-lead and proton-proton collisions at 5.02 TeV, the CMS collaboration firmly established the existence of a jet diffusion wake—a depletion of particles opposite to the jet direction—with a statistical significance exceeding 5 standard deviations, providing new insights into quark-gluon plasma properties.
Using 19.6 fb⁻¹ of data collected by the Belle II detector, this study searches for D-wave bottomonium states via the reaction near the resonance, finds no significant signals, and sets 90% credibility level upper limits on the relevant cross-section and branching fraction products.
This paper proposes that color-sextet scalar diquarks, unlike their color-triplet counterparts, can naturally explain the observed CP violation in decays and related U-spin sum rule deviations through unsuppressed amplitudes and a specific flavor hierarchy in their couplings.
This paper proposes a novel experimental search for dark photons at electron accelerators using inverse Compton scattering () with laser photons and a 3 GeV electron beam, demonstrating that this setup can probe unexplored regions of dark sector parameter space through photon counting techniques.
This paper proposes a photon collider extension to the 17.5 GeV European XFEL beam dump to explore the unique 5–12 GeV energy range, demonstrating through both simplified and full beam dynamics analyses that such a facility could significantly extend physics reach by observing heavy quark resonances and detecting Beyond Standard Model Axion-Like Particles via light-by-light scattering.
A fixed-target program at the Electron-Ion Collider would significantly advance nuclear physics by providing high-statistics data to constrain cold nuclear matter effects, map the QCD phase diagram at low energies, and measure critical cross sections for space radiation protection.