1442 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 demonstrates that within a general low-energy effective field theory, a massless complex scalar pair coupled via a purely left-handed vector current is the unique nonstandard invisible sector capable of exactly mimicking the Standard Model's Michel distribution in lepton decays, while all other higher-spin or interaction scenarios remain distinguishable.
This paper identifies a new spin-flavor entanglement structure in decays that encodes weak phase information, establishing a quantitative relationship where the precision of extracting the CKM angle scales inversely with the Wootters concurrence of the entangled system.
Using 7.33 fb of collision data collected by the BESIII detector, this study reports the first observations of the hadronic decays and and determines their branching fractions to be and , respectively.
This paper applies mechanistic interpretability techniques to a Particle Transformer for top quark tagging, revealing that a sparse six-head circuit effectively replicates the full model's performance by utilizing an energy correlator-based representation to identify 2-prong substructure, thereby demonstrating that gradient descent can rediscover physically meaningful features in jet physics without supervision.
This paper presents LHCb's first measurements of and top quark production cross-sections and charge asymmetries using 5.1–5.4 fb of data to probe electroweak physics and parton distribution functions, while also discussing recent searches for long-lived particles such as axion-like particles and heavy neutral leptons.
This paper reports that the 2023 summation model for reactor antineutrino fluxes revives the Reactor Antineutrino Anomaly at a significance level, creating a tension with gallium anomaly results and other neutrino data, which is reduced to when gallium systematic uncertainties are enlarged.
This paper presents a unified taxonomy and structured overview of uncertainty quantification in machine learning for physics, clarifying interpretations across statistical frameworks and outlining principled validation tools to ensure reliable probabilistic statements for scientific discovery.
This paper demonstrates through theoretical and particle-in-cell modeling that transverse ballistic cooling in expanding laser-irradiated plasma plumes drives Weibel-mediated electron current filaments, successfully explaining magnetic fluctuation data from OMEGA and Laser Megajoule experiments.
This paper reports the successful design, construction, and beam testing of a pilot 3D-projection detector using opaque water-based liquid scintillator (oWbLS), demonstrating its effective optical confinement and high timing resolution to validate the technology as a scalable concept for future particle physics experiments.
This paper demonstrates that vector boson fusion processes at the LHC can distinguish between Higgs portal and neutralino dark matter scenarios with over confidence by exploiting characteristic differences in jet transverse momentum and kinematic variables like and .