2101 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 QCD sum rules at finite temperature and density, this study reveals that while the in-medium masses of and multiplets remain remarkably stable with only minor shifts, their decay constants are highly sensitive to the medium, exhibiting significant particle-antiparticle asymmetry driven by baryon density that provides a theoretical foundation for future heavy-ion collision experiments.
Using 140 fb of 13 TeV proton-proton collision data from the ATLAS detector, this study searches for heavy neutral leptons in W boson decays via prompt same-charge dilepton or trilepton signatures, finding no significant excess over Standard Model backgrounds and thereby setting stringent upper limits on their mixing with electron and muon neutrinos across a mass range of 8–65 GeV.
This paper analyzes the latest LZ 2025 data to demonstrate that cosmic-ray-boosted light dark matter provides a powerful probe for sub-MeV electrophilic dark matter, yielding constraints that significantly surpass previous XENONnT limits and extend into previously unexplored regions of the light-mediator parameter space.
The CMS experiment measured the differential production cross sections of the (1S), (2S), and (3S) mesons in proton-proton collisions at = 13.6 TeV using 37.4 fb of 2022 data, analyzing their transverse momentum distributions in the 20–200 GeV range across two rapidity intervals via the dimuon decay channel.
This paper employs QCD light-cone sum rules to calculate the static electromagnetic properties of three charm-strange molecular tetraquark candidates, revealing that their magnetic moments are dominated by light quarks while their small quadrupole moments suggest nearly spherical charge distributions, thereby providing quantitative benchmarks to distinguish molecular structures from compact multiquark interpretations.
This paper proposes a novel statistical framework utilizing daily modulation from Earth-shielding effects in low-threshold liquid-noble detectors to disentangle and validate sub-GeV dark matter interactions with both electrons and nuclei, demonstrated through a case study of DarkSide-50 data.
This paper investigates how a GeV-scale Higgs-portal scalar can drive an early matter-dominated era and links the resulting reheating temperature to long-lived particle signatures, demonstrating that FCC-hh displaced-decay searches can probe transition temperatures up to the electroweak scale.
This paper introduces the "well-tempered likelihood," a method that adjusts likelihood-based confidence intervals by scaling them with a goodness-of-fit statistic to prevent overconfidence and ensure robust constraints when statistical models are misspecified.
Using lattice QCD simulations with four physical-mass quark flavors, this study determines the momentum fractions and angular momentum contributions of quarks and gluons in the proton, confirming that both the momentum and spin sum rules are satisfied in the continuum limit.
The paper demonstrates that the RES-NOVA experiment, utilizing high-density PbWO4 scintillating bolometers made from archaeological lead, offers a promising multi-coupling probe for solar axions with projected sensitivities competitive with major dark matter detectors and presents the first experimental exclusion limits derived from a prototype.