2131 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 that analyzing – interference in the rare decay transforms the channel into a clean probe of short-distance violation, enabling LHCb to constrain the CKM parameter to within 35% of its Standard Model value and resolve the sign ambiguity of the amplitude with over 3 significance by the high-luminosity LHC era.
The ATLAS collaboration reports evidence exceeding three standard deviations for the formation of quasi-bound states near the threshold in 13 TeV $pp$ collisions, as the measured normalised differential distributions are better described by models incorporating these states than by standard perturbative QCD predictions.
This paper reports the NA62 experiment's latest results, including a Standard Model-compatible measurement of the ultra-rare decay and the setting of new upper limits on heavy neutral lepton couplings based on a null search for new-physics particles in beam-dump mode data.
The BULLKID detector array, operated with moderate shielding in a surface laboratory, demonstrated background levels consistent with simulations down to 600 eV over a 290-hour exposure, while revealing an unexplained rise in the 225–600 eV range that differs from low-energy excesses observed in other cryogenic experiments.
This paper presents a five-stage cascade pipeline architecture implemented on AMD Versal AI Engine arrays to efficiently evaluate leading-order matrix elements for the process, achieving a projected throughput of evaluations per second with a speedup and energy efficiency improvement over a single CPU core while maintaining parts-per-million numerical accuracy.
Using 138 fb of proton-proton collision data at 13 TeV collected by the CMS detector, this paper presents a search for a heavy scalar resonance decaying into a Higgs boson and a new scalar particle in the four-bottom-quark final state, finding no significant evidence for new physics beyond the background expectation while setting upper limits on production cross sections within the next-to-minimal supersymmetric standard model scenario.
This review article outlines the theoretical foundations of magnetic monopoles and provides a historical overview of experimental searches, with a specific focus on current efforts in cosmic and collider experiments, particularly at the Large Hadron Collider.
This paper presents a search for narrow dijet resonances in the 0.6–1.8 TeV mass range using 117 fb of 13 TeV proton-proton collision data collected via the "data scouting" technique, finding no evidence of new particles and setting model-independent upper limits on production cross sections and dark matter mediator couplings.
Using 137 fb of proton-proton collision data at 13 TeV collected by the CMS experiment, this study finds no significant deviations from the Standard Model in events with a single photon and missing transverse momentum, thereby establishing the most stringent 95% confidence level limits to date on dark matter mediators, effective field theory suppression scales, and fundamental Planck scales.
This paper provides direct experimental evidence for quark confinement within the proton by demonstrating that the force between quarks is attractive and constant across a wide range of positions, derived from available data and Quantum Chromodynamics.