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 presents the operation, calibration, and performance evaluation of the upgraded LHCb muon detector during Run 3, demonstrating that despite a fivefold increase in instantaneous luminosity, the system achieves a muon identification efficiency above 90% with sub-percent hadron misidentification probability.
This paper proposes a dynamical framework linking the dark matter-baryon coincidence to a GeV-scale asymmetric dark matter scenario, where a strongly supercooled dark confinement phase transition—potentially responsible for observed nano-Hz gravitational waves—naturally correlates the dark matter mass with the ultraviolet completion of the neutron portal operator.
Using 13 TeV proton-proton collision data from the LHCb experiment, researchers observed a new excited charm-strange meson, , with a statistical significance exceeding 10 standard deviations, measuring its mass at approximately 2933 MeV and identifying it as a candidate for a state with .
This paper reports the design and initial performance of a 13-liter liquid argon test stand at Wellesley College, which successfully achieved an oxygen-equivalent impurity concentration of 0.25 ppb and an electron lifetime of 1.2 ms to support R&D for future large-scale liquid argon time projection chambers.
This paper reports the successful operation and performance evaluation of a 240-pixel transition-edge sensor (TES) spectrometer at SPring-8, demonstrating its high energy resolution and wide-band capabilities for simultaneous multi-element analysis, trace element detection, and XANES studies in fluorescence mode.
This paper proposes a novel approach using quantum tomography to reconstruct the spin density matrix of diboson systems, enabling the simultaneous and superior constraint of both CP-even and CP-violating SMEFT operators by exploiting full Beyond-Standard-Model signatures, including pure quadratic new physics terms that are typically degenerate in traditional polarisation-blind observables.
This paper interprets nine statistically significant LHC decay channels around 650 GeV as evidence for a sequence of spin-2 Kaluza-Klein graviton resonances (specifically T690) and potential spin-0 scalars within a composite or Randall-Sundrum framework, suggesting that these findings support the case for future high-luminosity colliders to produce and study these new particles.
The ATLAS collaboration performed a search for Higgs boson pair production in the final state using 308 fb of proton-proton collision data at and 13.6 TeV, finding no significant excess over the Standard Model prediction and setting a 95% confidence-level upper limit on the production cross-section of while constraining the Higgs self-coupling modifier to the range .
This paper recasts existing analyses to search for charged Higgs bosons decaying via the $WZ$ channel, setting sub-permille limits on their production that constrain the triplet vacuum expectation value more stringently than previous modes or electroweak precision data, while a excess supports the existence of a GeV boson.
This paper presents the first complete next-to-leading order QCD calculation for fully charm tetraquark production at hadronic collisions, incorporating gluon radiation effects through resummation and utilizing LHCb and CMS data to extract universal long-distance matrix elements and predict kinematic distributions for the and its spin-zero partners.