2585 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 presents a deep neural network-based approach trained on ALICE data from LHC Runs 1 and 2 to interpolate and extrapolate proton-proton transverse-momentum spectra for unmeasured center-of-mass energies relevant to LHC Run 3 and beyond.
This paper introduces a novel inclusive-tagging scheme based on an asymptotically recursive vector sequence that enables the first indirect reconstruction of multiple undetected particles, such as neutrinos, in collider experiments, thereby significantly enhancing the precision of Standard Model measurements and the search for new physics.
This paper calculates the effects of quantum decoherence on maximally entangled fermion pairs at colliders by identifying the relevant Kraus operators with integrated Altarelli-Parisi splitting functions, addressing a factor often neglected in recent LHC measurements of top-quark spin entanglement.
Using an electron-tracking Compton camera during a one-day flight over Australia, researchers achieved the first direct detection of Galactic center gamma-ray emission in the 150–600 keV band with a 7.9σ significance, demonstrating the instrument's high sensitivity and validating its potential for future high-precision MeV gamma-ray surveys.
Using 5.4 fb of LHCb collision data, the first searches for and decays were conducted, resulting in no observed signal and the establishment of new upper limits on their branching fractions, including a tenfold improvement on the previous best limit for .
Using 138 fb of 13 TeV proton-proton collision data collected by the CMS detector, this study presents the first LHC search for Higgs boson decays into pairs of light pseudoscalar bosons that subsequently decay into four electrons, finding no significant excess and setting stringent upper limits on the branching fraction down to for pseudoscalar masses between 10 and 100 MeV.
This paper presents the first complete analytical derivation of one-loop electroweak and QED corrections to leptonic decays, demonstrating that incorporating these radiative effects resolves the reported violation of CKM unitarity in the second column and highlights the need for improved lattice simulations including QED corrections to further confirm the Standard Model.
Using 9 fb⁻¹ of LHCb collision data from 2011–2018, this study measures the branching fractions and longitudinal polarisation fractions of and decays to , confirming a 4.4 tension between experimental results and theoretical predictions regarding longitudinal polarisation in decays.
Using 20.3 fb of collision data collected by the BESIII detector, this paper presents the first amplitude analysis of the decay, identifying the component as dominant and reporting precise measurements of the total branching fraction, intermediate fit fractions, and CP asymmetries.
This paper utilizes computational fluid dynamics to characterize and optimize the dry nitrogen flushing scheme for the ATLAS Inner Tracker's High Luminosity upgrade, ensuring that moisture ingress is effectively managed to prevent condensation and protect detector electronics from damage at extreme low temperatures.