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 utilizes the String Melting mode of the AMPT model to investigate the scaling behavior and intermittency of charged particle multiplicity fluctuations in Xe–Xe collisions at = 5.44 TeV, determining key parameters such as anomalous fractal dimensions and scaling exponents to characterize the system's self-similar dynamics and provide baseline predictions.
Using 199 fb of proton-proton collision data collected by the ATLAS detector at 13 and 13.6 TeV, a search for a heavy scalar resonance decaying into a lighter scalar and a Higgs boson in the final state found no significant excess over the Standard Model background, leading to the setting of 95% confidence level upper limits on the production cross-section times branching fraction.
This study reports the first epitaxial growth of NaKSb films on graphene-coated SiC, enabling the identification of (111) surface electronic states via ARPES and DFT, and demonstrating that the film's crystalline order is preserved after Cs/Sb activation to facilitate future improvements in multialkali photocathodes.
The RadioAxion experiment, conducted underground at the Gran Sasso Laboratory using a NaI detector to monitor the 59.5 keV gamma line of Am alpha decay, reports no evidence of periodic modulations indicative of axion dark matter and consequently establishes new constraints on the axion decay constant for masses between and eV.
This paper argues that standard pointwise metrics like RMSE and MAE structurally fail to evaluate multimodal inverse problems by systematically biasing reconstructions toward narrower distributions, and proposes a three-part evaluation protocol based on distributional accuracy, spectrum fidelity, and uncertainty calibration to ensure scientifically valid conclusions.
This paper presents a modular, automated probe card system designed for the scalable electrical characterization of full-size pixelated LGAD sensors, demonstrating its capability to perform rapid I-V and C-V measurements with minimal leakage current to address the quality control needs of large-scale particle physics experiments.
This paper investigates and addresses time-resolution degradation in GasPM detectors caused by photon-feedback signals through improved beam tests with high-speed digitizers and cosmic-ray studies utilizing a robust LaB photocathode, aiming to enhance performance for future Belle II upgrades.
This paper presents a comprehensive SMEFT analysis of correlated and rare semileptonic transitions, demonstrating that while complex left-handed four-fermion operators and electroweak corrections explain anomalies, flavor-universal couplings are ruled out by kaon data, necessitating Minimal Flavor Violation frameworks like or to reconcile predictions with experimental bounds while predicting observable CP asymmetries.
This paper demonstrates that FPGA-based implementations, developed using High-Level Synthesis, can significantly accelerate specific components of Monte Carlo event generation workflows—such as full matrix-element calculations for simple processes and color-algebra kernels for complex ones—while achieving superior energy efficiency and scalability compared to traditional CPU and GPU solutions without compromising numerical accuracy.
This paper presents a phenomenological study of charged long-lived staus predicted by the gauge-mediated supersymmetry breaking model, demonstrating their potential for discovery via kinked tracks and displaced vertices at the Future Circular Collider (FCC-ee) for lifetimes ranging from 20 cm to 20 m.