1467 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 proposes a novel axion detection method for masses between and eV that utilizes a large cylindrical sample with low electrical conductivity to generate a measurable bulk oscillating current under a magnetic field, offering a feasible signal-to-noise ratio even at cryogenic temperatures.
This paper employs QCD sum rules to investigate the masses of purely top-quark bound states, finding that the calculated pseudoscalar toponium mass aligns with recent CMS and ATLAS observations near the threshold while also providing theoretical predictions for the vector toponium and triply-top baryon to guide future high-energy collider experiments.
Using 39.1 kg·yr of exposure from the PandaX-4T experiment, this study presents the most precise measurement to date of the Xe two-neutrino double beta decay half-life, provides a consistent measurement of the nuclear matrix element ratio , and establishes the world's most stringent limit on Majoron-emitting modes with spectral index .
This paper investigates the potential for the Mu2e experiment to detect lepton-flavor-violating transitions in muonic atoms mediated by axion-like particles, concluding that while light mediators can parametrically enhance the rate, stringent constraints from electron anomalous magnetic moments and other flavor-violating processes severely limit the observable branching ratio to at most , making the upcoming Mu3e experiment the most promising probe for the viable parameter space.
This paper presents significant upgrades to the Super-Kamiokande "SNWATCH" system, including a new HEALPix-based fitter and an optimized maximum-likelihood fitter that leverage gadolinium-enhanced data to reduce supernova alert generation time to approximately 90 seconds while improving the accuracy of pointing direction reconstruction.
This paper presents measurements of prompt and non-prompt J/ production yields at midrapidity in 13 TeV pp collisions, revealing a stronger-than-linear increase in self-normalized yields with charged-particle multiplicity that varies depending on the azimuthal region relative to the J/ momentum.
This paper presents the latest T2K experiment results, highlighting the first data from a gadolinium-loaded far detector and world-first cross-section measurements of rare interaction channels to demonstrate the critical synergy between interaction modeling and oscillation analysis in the search for leptonic charge-parity violation.
This paper presents a new method and comprehensive analysis of decays to determine the production fraction ratio , providing evidence for isospin violation at and revising branching fractions to potentially alleviate the puzzle.
The LHCb collaboration presents the first search for the lepton-flavour violating decay using 9 fb of proton-proton collision data, finding no significant signal and setting a new world-record upper limit on the branching fraction of , which provides the first constraint on such transitions at the LHC.
This paper introduces a data-driven framework for estimating trigger efficiencies at LHCb and presents the design, implementation, and performance of the centralised software package TriggerCalib, which facilitates these calculations and uncertainty estimations for physics analyses.