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.
The TREX-DM collaboration successfully implemented a CNA-produced Ar calibration source and a novel GEM-Micromegas readout system to detect low-energy argon decay emissions, achieving an unprecedented energy threshold approaching the single-electron ionization limit for low-mass dark matter searches.
This paper demonstrates that measurements of asymmetries in at Belle II, particularly those arising from the imaginary parts of light new physics contributions even without electron polarization, can be interpreted as model-dependent constraints on the lepton's dipole moments, offering a novel avenue for new physics searches using existing data.
This paper presents a comprehensive analysis of light new physics contributions to lepton dipole moments, offering tailored interpretations of asymmetry measurements for spin-0 and spin-1 bosons while examining their transition to the effective-field-theory limit and complementarity with other constraints, with a specific focus on a tauphilic gauge vector boson at Belle II.
Through a reanalysis of data from the CAPP-12T MC-Axion Haloscope experiment, this study establishes exclusion limits for monochromatic high-frequency gravitational waves for the first time, demonstrating the suitability of electromagnetic resonant cavities as detectors and constraining black hole superradiance scenarios involving axion clouds.
This paper highlights the potential of rare charm hadron decays as clean probes for invisible particles like neutrinos, axion-like particles, and dark photons, demonstrating that existing and future high-luminosity experiments can significantly constrain or discover new physics beyond the Standard Model through branching ratios that are currently weakly limited.
This paper employs nonlinear sequence-transformation techniques, specifically the Shanks transformation and Wynn's -algorithm, to estimate higher-order perturbative coefficients and predict the QCD correction for hadronic decays, offering an efficient alternative to explicit multi-loop calculations.
This work investigates the tensor form factors and quark tensor charges of the hyperons , , and within the framework of QCD sum rules and provides new non-perturbative insights into the spin structure of spin-3/2 baryons for future phenomenological and experimental studies.
Using 9 fb of proton-proton collision data from the LHCb detector, this paper reports the first observation of the decay with a significance of 6.5 and measures its branching fraction relative to the mode to be .
This paper demonstrates that ultrarelativistically frozen-out (UFO) dark matter candidates, particularly those mediated by a portal, represent a viable and detectable alternative to traditional WIMPs, with current experiments like LZ and XENONnT already constraining their parameter space and future detectors such as SuperCDMS SNOLAB poised to explore significant regions in the 0.5–10 GeV mass range.
This paper summarizes the current status of exclusive semileptonic branching fractions, identifies unmeasured components dominated by baryonic and final states, and proposes specific candidates and simplified models to close the gap with inclusive measurements.