2610 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 critically examines a recent analysis claiming evidence for a QCD critical end point via finite-size scaling of net-proton cumulants, highlighting methodological issues regarding acceptance windows, multiplicity scaling, and thermodynamic fields that must be addressed for a consistent interpretation.
This paper investigates fragmentation contributions to transverse nucleon spin observables in semi-inclusive deep-inelastic scattering at next-to-leading order within the collinear twist-3 factorization framework, confirming the validity of the formalism at the one-loop level and providing numerical predictions for HERMES and future EIC kinematics.
Using 158 million decays collected by the Belle detector, this paper reports the first searches for charged-lepton-flavor violation in decays, finding no significant signals and setting upper limits on the relevant branching fractions at the to level.
Using LHCb data from 2016 to 2018, this paper reports the first measurement of the flavor-untagged decay-time-integrated asymmetry in decays, finding a result consistent with Standard Model predictions and providing direct constraints on new physics in tree-level -hadron decays.
The SUPAX prototype experiment successfully operated a 2 K copper cavity in a 12 T magnetic field to exclude axion-photon couplings down to GeV and dark photon kinetic mixing parameters above in the mass range around eV, demonstrating the viability of the full-scale haloscope design.
Using 138 fb of proton-proton collision data at 13 TeV, the CMS experiment searched for massive leptophobic Z' bosons decaying into charginos in final states with two oppositely charged leptons and missing transverse momentum, finding no evidence of new physics and setting upper limits that exclude Z' boson masses up to approximately 3.5 TeV.
This paper demonstrates that introducing dark decay channels for sub-GeV heavy neutral leptons fails to evade cosmological constraints, as the resulting increase in extra radiation energy density actually strengthens Big Bang Nucleosynthesis bounds on their mixing angles.
Using a dataset with double the previous exposure and improved analysis techniques, the NOvA experiment reports its most precise single-experiment constraints on atmospheric neutrino mass splitting and mixing parameters, showing a mild preference for the normal mass ordering that strengthens to 87% probability when combined with Daya Bay data.
Using QCD sum rules, this paper investigates triquark-antitriquark hexaquark configurations to interpret the BESIII-observed and states, finding that two predicted candidates match the experimental masses while offering new predictions for and states and analyzing their decay modes.
This paper establishes robust upper bounds on heavy QCD axion lifetimes as low as 0.017 seconds by analyzing Big Bang Nucleosynthesis constraints on neutron-to-proton ratio modifications from hadronic decays, a limit that surpasses projected future CMB bounds and remains largely insensitive to hadronic uncertainties.