1311 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 demonstrates that naturalness scenarios naturally suppress neutrino masses through a mechanism involving numerous mixing partners, leading to a specific tower of additional neutrino mass eigenstates that offers unique, testable signatures in terrestrial oscillation, mass, and neutrinoless double beta decay experiments, thereby extending the model's phenomenological reach beyond cosmology.
This paper proposes a rigorous method for identifying and controlling detector-related systematic uncertainties in two-body mass measurements, demonstrating its application to the LHCb experiment's potential to improve the precision of the hyperon mass measurement by a factor of three to a total uncertainty of 2.2 keV/.
Using 7.33 fb⁻¹ of collision data collected with the BESIII detector, this paper reports the first measurement of the decay, determining its branching fraction and the form factor to provide the most precise extraction of from this channel and the first test of lepton flavor universality in these decays.
Using data from the CMS detector at the CERN LHC, this study reports the first observation of suppressed charged-particle production in ultrarelativistic oxygen-oxygen collisions, evidenced by a nuclear modification factor below unity that supports the existence of parton energy loss in intermediate-sized nuclear systems.
The LHCb collaboration measured charged-hadron distributions in beauty and charm jets from 13 TeV proton-proton collisions, observing differences consistent with the dead-cone effect and hard fragmentation that provide new constraints on heavy-flavor hadronization mechanisms.
This paper presents a comprehensive study of the expected precision for Higgs boson hadronic decay modes () at the FCC-ee, demonstrating that combining $ZH$ and Vector boson fusion processes with four IDEA detectors will achieve percent-to-per-mil level measurements and provide the first sensitivity to evidence the rare decay.
Using 14 years of Telescope Array Surface Detector data and a neural network classifier fine-tuned on experimental data to distinguish between proton- and photon-induced events, the study reports no significant photon candidates and establishes an updated upper limit on the diffuse ultra-high-energy photon flux above eV of .
Using 13 TeV proton-proton collision data from the LHCb experiment, this study presents the most precise measurements to date of CP asymmetries and the branching fraction ratio for and decays, while also setting upper limits on the rare decay.
This paper demonstrates that the DUNE-PRISM technique, which utilizes measurements at multiple off-axis angles to mitigate flux and cross-section systematic uncertainties, significantly restores the sensitivity of the DUNE experiment to new physics scenarios like non-unitarity and sterile neutrinos in the electron and muon sectors, while providing high-statistics flux data for future analyses.
This paper demonstrates that the sensitivity of future long-baseline neutrino experiments like DUNE and T2HK to leptonic CP violation is significantly degraded by model-dependent cross-section assumptions, but this loss can be largely recovered by incorporating precise, data-driven cross-section measurements from the proposed SCOPE experiment.