2517 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 reports the development and characterization of a novel 10 mol% rubidium-doped CsI scintillator crystal, which utilizes intrinsic Rb beta-decay to enable high-efficiency source-in-detector spectroscopy for investigating forbidden beta-decay mechanisms and searching for keV-scale sterile neutrinos.
Using 495 pb of data from a center-of-mass energy scan between 3.58 and 3.71 GeV, this study fills an experimental gap around the resonance by measuring cross sections and effective form factors, thereby extracting the relative phase between strong and electromagnetic amplitudes and determining corresponding branching fractions that support phase universality.
Using 2.1 tonne-years of data from the XENONnT experiment, this study searches for magnetic and spin-independent inelastic dark matter by identifying unique signatures of nuclear recoils followed by delayed de-excitation photons, ultimately finding results consistent with background expectations and setting 90% C.L. upper limits across the GeV/c² to TeV/c² mass range.
This paper demonstrates a symmetry-resolved complementarity between mixing and rare decays involving massless dark photons, showing how combining these constraints allows for the analytical elimination of flavor dependence to derive direct bounds on invisible decay rates and conditional limits on dark charge conjugation breaking portals.
This paper analyzes the decay to propose that the observed 4.63 GeV enhancement in the spectrum corresponds to the charmonium state , while noting a significant discrepancy between the fitted production rate and theoretical predictions from factorization and hadron-loop mechanisms.
This paper demonstrates that combining DUNE and T2HK data allows for a novel, neutrino-only search for time-reversal violation by analyzing the baseline dependence of oscillation probabilities, achieving up to 4σ significance and highlighting the complementary strengths of the two experiments in probing T and CP violation.
Using a sample of 10 billion events from the BESIII detector, this study reports the first experimental observation of the Dalitz decay , measuring its branching fraction as and determining the transition magnetic moment to be , with the branching fraction result showing a discrepancy from previous theoretical predictions.
Using data collected by the BESIII detector, this paper reports the first observation of the hadronic decays and , measuring their branching fractions and finding that their ratio is consistent with the 12%-rule while revealing no significant intermediate states or threshold enhancements.
This paper extends the constituent gluon model to predict the mass spectra and strong decay properties of ground charmonium hybrids, finding agreement with lattice QCD and recommending specific exotic and ordinary quantum number states as prime targets for future experimental searches.
This chapter outlines the contemporary theoretical understanding of exotic hadrons containing essential gluonic excitations, specifically glueballs and hybrids, while discussing the challenges involved in definitively identifying these states within the experimental hadron spectrum.