1495 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 projected search for additional scalar bosons within the Inert Doublet Model at the FCC-ee, utilizing a parametric neural network to analyze final states with two leptons at 240 and 365 GeV, demonstrating the potential to exclude nearly the entire available parameter space and discover new scalars with masses up to 110 and 165 GeV respectively.
Using a large sample of events collected by the BESIII experiment, this study extracts the transition form factor slope and branching fractions for and decays via the channel, combines these results with previous measurements to improve precision, and sets new upper limits on dark photon production without observing a significant signal.
This study presents the first observational evidence for magnetospheric vacuum birefringence, a key prediction of quantum electrodynamics, by analyzing the high and energy-dependent X-ray polarization of the radio magnetar 1E 1547.0--5408 using data from IXPE, NICER, and Parkes.
The paper conjectures a remarkable correlation among the first-row elements of the lepton mixing matrix, , which remains consistent with unitarity limits and is currently supported by JUNO and Daya Bay precision measurements at nearly the confidence level.
The CMS experiment reports the first observation of single top quark production in association with W and Z bosons (tWZ) using 200 fb of proton-proton collision data at 13 and 13.6 TeV, achieving a statistical significance of 5.8 standard deviations with measured cross sections of 248 52 fb and 242 77 fb, respectively.
This paper presents an extension of the MadGraph5_aMC@NLO framework that enables automated leading-order calculations for S-wave quarkonium and leptonium production within NRQCD and NRQED formalisms, offering seamless integration with Beyond the Standard Model scenarios and highlighting the necessity of careful theoretical analysis beyond simple velocity-scaling rules.
This study systematically investigates the gravitational wave emission from a population of millisecond pulsars proposed to explain the Galactic Center GeV gamma-ray excess, concluding that while current detectors cannot observe them, next-generation instruments like the Einstein Telescope and Cosmic Explorer may detect these signals to definitively test the pulsar versus dark matter interpretations of the excess.
Using dijet-hadron correlations in lead-lead and proton-proton collisions at 5.02 TeV, the CMS collaboration firmly established the existence of a jet diffusion wake—a depletion of particles opposite to the jet direction—with a statistical significance exceeding 5 standard deviations, providing new insights into quark-gluon plasma properties.
This paper proposes that color-sextet scalar diquarks, unlike their color-triplet counterparts, can naturally explain the observed CP violation in decays and related U-spin sum rule deviations through unsuppressed amplitudes and a specific flavor hierarchy in their couplings.
This paper proposes a novel experimental search for dark photons at electron accelerators using inverse Compton scattering () with laser photons and a 3 GeV electron beam, demonstrating that this setup can probe unexplored regions of dark sector parameter space through photon counting techniques.