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 identifies fluorine-based compounds, particularly octafluoropropane, as optimal targets for measuring subleading axial-vector contributions in coherent elastic neutrino-nucleus scattering, demonstrating that such experiments could determine the axial coupling at the level and probe spin-dependent new physics.
This paper presents a unified Froggatt-Nielsen effective theory with three right-handed neutrinos and complex coefficients that simultaneously explains fermion flavor hierarchies, neutrino masses, dark matter, and the baryon asymmetry of the Universe, demonstrating that successful thermal leptogenesis is viable in both freeze-in and freeze-out scenarios.
This paper demonstrates that for near-horizontal cosmic-ray air showers, the longitudinal development can be reconstructed by mapping the time dependence of the observed induced electric field to atmospheric slant depth, enabling the inference of key shower parameters such as from single observer measurements.
Using a Ramsey-type apparatus with cold neutrons, researchers analyzed 24 hours of data to find no evidence of oscillating axion-like dark matter, thereby establishing the most stringent limits to date on the coupling between axion-like particles and gluons within a specific mass range.
This paper investigates and analytically describes the "resonant cancellation" effect, where an additional oscillating magnetic field aligned with the static main field causes the modulation of Larmor precession to vanish when the particle interaction time matches the oscillation period, a phenomenon experimentally verified using a monochromatic cold neutron beam.
The paper proposes a novel nuclear interferometer utilizing the thorium-229 clock transition to detect ultra-light dark matter, offering enhanced sensitivity to variations in fundamental constants and the QCD sector that could complement and surpass existing terrestrial clock experiments.
This paper presents a data-driven multilateration method that utilizes the arrival times of the first inverse beta decay neutrino events across multiple detectors, combined with a reference lightcurve from a larger detector, to rapidly estimate the direction and generate probability skymaps for Galactic core-collapse supernovae without relying on simulations.
This paper investigates the mass spectra and strong and radiative decay properties of high-lying and charmonium states around 4 GeV, incorporating unquenched effects to provide theoretical predictions that guide future experimental searches at facilities like BESIII, Belle II, LHCb, and STCF.
Using 138 fb of proton-proton collision data at 13 TeV, the CMS experiment performed a search for nonresonant new physics in high-mass dilepton events associated with b-tagged jets, finding no significant deviations from the Standard Model and setting lower limits on the energy scale of effective field theory operators involving four-fermion contact interactions.
Using 2024 LHCb Run 3 proton-proton collision data, this paper reports the most precise single-experiment measurement of the time-integrated asymmetry in decays to date, yielding a value of .