2144 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.
The paper proposes DREAMuS, a fixed-target experiment at HIAF designed to search for GeV-scale muon-philic dark matter mediated by light flavor-violating bosons, demonstrating competitive sensitivity to couplings around and highlighting the enhanced discovery potential of a complementary beam option for sub-200 MeV dark matter.
This paper presents recent BESIII collaboration results on charmed purely leptonic and semileptonic decays, including measurements of branching fractions, CKM matrix elements, decay constants, form factors, and tests of lepton flavor universality derived from data collected at various center-of-mass energies.
This paper utilizes QCD sum rule methods to model the resonance as a all-charm tetraquark in a diquark-antidiquark configuration, calculating its mass and decay widths to demonstrate consistency with experimental data and support its interpretation as a tensor state.
Using 138 fb of 13 TeV proton-proton collision data from the CMS detector, this study presents the first fully hadronic search for a heavy vector-like top quark () decaying to a top quark and a neutral scalar boson (), setting the most stringent limits to date on masses above 2 TeV and excluding masses between 0.85 and 1.3 TeV for a standard model Higgs boson scenario without observing any significant excess over background predictions.
Using 138 fb⁻¹ of proton-proton collision data at 13 TeV collected by the CMS detector, this study presents model-independent and model-dependent searches that exclude semiclassical black holes and string balls with masses below approximately 8.4–11.4 TeV and 9.0–10.7 TeV, respectively, while setting a 95% confidence level upper limit of 0.0034 on the fraction of quark-quark interactions producing electroweak sphalerons above 9 TeV.
This paper investigates the lifetimes and inclusive semileptonic decay widths of doubly heavy baryons using the heavy quark expansion with next-to-leading-order corrections and bag model matrix elements, predicting specific lifetime hierarchies and highlighting the crucial role of -exchange contributions in explaining the large lifetime splitting observed in the doubly charmed sector.
Using LHCb Run 2 data, this study measures the inclusive production branching fractions of , , and charmonium states in -hadron decays via their decay mode, reports the production rate of , and achieves the most precise measurement to date of the mass.
Using the full Run 2 LHCb dataset, the first observation of the charmless purely baryonic decay is reported with a statistical significance of , yielding a measured relative branching fraction of .
This paper introduces "SemiCharmTag," a novel tool for LHCb that utilizes secondary vertex hadron track tagging to effectively reject or isolate charm semileptonic backgrounds in dimuon Drell-Yan measurements at 13.6 TeV, significantly improving signal-to-background ratios while enabling the creation of unbiased charm-enriched samples.
This paper reviews recent analyses by the ATLAS and CMS Collaborations on rare top quark production processes, which, despite their low cross sections, offer unique sensitivity to top quark couplings and potential physics beyond the Standard Model.