2101 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 precision analysis of semileptonic and non-leptonic meson decays into P-wave charmonium states, utilizing NRQCD-based form factors constrained by experimental radiative decay data to provide updated predictions for branching fractions and lepton flavor universality ratios.
This paper presents a methodology using MOSFET test structures to non-destructively characterize p-stop isolation implants in silicon sensors by extracting threshold voltage and reconstructing depth-dependent doping profiles to monitor inter-electrode isolation properties.
This paper presents new high-precision measurements of the proton's spin structure function at low momentum transfer from the Jefferson Lab E08-027 experiment, utilizing longitudinally polarized data to complement previously published transverse results and provide updated insights into proton spin sum rules and moments.
This paper introduces a multi-agent framework utilizing task decomposition and quantity-grounded semantic differencing to enhance the transparency, reproducibility, and reliability of scientific analyses generated by LLMs by explicitly identifying and resolving ambiguities in user instructions and implementation assumptions.
This paper discusses the separation of energy scales in soft hadron scattering, distinguishing between the scale where total cross-sections begin to rise (governed by absorption features) and the asymptotic scale (dominated by unitarity effects), while establishing a relationship between them through the transition from shadow to reflective scattering.
The paper introduces **ggxy**, a fast and flexible C++ library that calculates Next-to-Leading Order (NLO) QCD corrections for gluon-initiated top-mediated processes like , , and with full top-quark mass dependence, featuring analytical approximations for two-loop virtual amplitudes and an interface to Powheg for parton shower matching.
This paper presents simultaneous measurements of -jet identification and -jet misidentification efficiencies for the GN2 tagger using 56 fb of TeV ATLAS data, achieving precisions better than 2% and 5% respectively by leveraging known branching fractions and kinematic likelihood reconstruction.
Using 2023 proton-proton collision data at TeV, this study measures the detection efficiency of 137 GE1/1 GEM chambers in the upgraded CMS Endcap Muon System, finding an average efficiency of approximately 93.3% (rising to 96% for fully functional detectors) that remains unaffected by pile-up.
This paper presents updated predictions for -baryon lifetimes and their ratios within the heavy quark expansion framework by incorporating next-to-next-to-leading-order QCD corrections to free -quark decay and complete next-to-leading-order corrections to dimension-five contributions, resulting in significantly reduced theoretical uncertainties and excellent agreement with experimental data.
This Letter proposes that the observation of a prominent Jacobian peak in the transverse momentum distribution of mesons in reactions serves as a definitive criterion to confirm the existence of the resonance and distinguish it from interference effects.