2160 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 41.6 fb of 13 TeV proton-proton collision data collected by the CMS experiment in 2018, this study searches for low-mass hidden-valley dark showers via non-prompt muon pairs from Higgs boson decays, setting new upper limits on the branching fraction to dark partons and establishing first constraints on extended dark-shower models with dark photons.
Using 5 fb⁻¹ of proton-proton collision data at 13 TeV collected by the LHCb experiment, this study searches for long-lived heavy neutral leptons in B-meson decays to a muon-pion final state, finding no significant excess and setting new constraints on their mixing with muon neutrinos in the 1.6–5.5 GeV mass range for both lepton-number-conserving and violating scenarios.
Using events, the BESIII experiment set the world's most stringent limits on invisible baryon decays and oscillations, finding no evidence for baryon-number violation or connections to the dark sector.
This paper investigates unexpected anomalies in CMS experiment data identified by the OmniLearned foundation model, finding that while background estimates perform well in validation regions, they fail to accurately model the signal region, prompting a call for further scrutiny.
Using 5.4 fb of 13 TeV proton-proton collision data collected by the LHCb detector, this study measures the jet fragmentation functions and radial profiles of mesons reconstructed via decays, revealing an increasing contribution from gluon fragmentation as jet transverse momentum rises.
This paper presents a comprehensive five-year analysis of scintillation light performance in the MicroBooNE detector, detailing its simulation, calibration, and triggering efficiency while reporting novel observations of a significant long-term light yield decline and an unexpectedly high single photoelectron noise rate.
Using a novel method to tag antineutrons from decays within a sample of over 10 million events collected by the BESIII detector, researchers measured the cross sections for the inelastic scattering processes and to be mb and mb respectively, demonstrating the viability of this approach for future studies of antineutron-proton interactions.
Using data from the Belle and Belle II experiments, this paper reports the first search for the rare decay , finding no significant excess and setting an improved upper limit on its branching fraction of at the 90% confidence level.
This paper presents sensitivity projections for the NUCLEUS experiment at Chooz, demonstrating its potential to achieve a 4.7 observation of coherent elastic neutrino-nucleus scattering and provide leading constraints on new physics by utilizing gram-scale cryogenic calorimeters to access unprecedentedly low nuclear recoil energies.
This chapter introduces the fundamentals of the three-flavor neutrino oscillation paradigm, detailing the six undetermined oscillation parameters, the experimental history of the phenomenon, and the theoretical framework including matter effects that guide current large-scale particle physics experiments.