1380 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 a dynamical framework linking the dark matter-baryon coincidence to a GeV-scale asymmetric dark matter scenario, where a strongly supercooled dark confinement phase transition—potentially responsible for observed nano-Hz gravitational waves—naturally correlates the dark matter mass with the ultraviolet completion of the neutron portal operator.
Using 13 TeV proton-proton collision data from the LHCb experiment, researchers observed a new excited charm-strange meson, , with a statistical significance exceeding 10 standard deviations, measuring its mass at approximately 2933 MeV and identifying it as a candidate for a state with .
This paper reports the design and initial performance of a 13-liter liquid argon test stand at Wellesley College, which successfully achieved an oxygen-equivalent impurity concentration of 0.25 ppb and an electron lifetime of 1.2 ms to support R&D for future large-scale liquid argon time projection chambers.
The LUX-ZEPLIN experiment reports the first direct constraint on the individual positron emission branching levels of the activation product , measuring a total branching ratio of % with a statistical significance of 5.5.
This paper presents a publicly available, SPICE-compatible BSIM4 model for SkyWater 130 nm MOSFETs at 77 K, developed through DC characterization to enable reliable, low-power circuit design for high-energy physics applications such as liquid argon detectors.
This paper presents the first implementation of AI agents within a vertically-integrated differentiable full simulation framework to autonomously optimize high-energy physics detector parameters, demonstrating their ability to reduce labor and compute while effectively navigating complex design spaces for tasks like dual-readout calorimeter optimization.
This paper reports the successful operation and performance evaluation of a 240-pixel transition-edge sensor (TES) spectrometer at SPring-8, demonstrating its high energy resolution and wide-band capabilities for simultaneous multi-element analysis, trace element detection, and XANES studies in fluorescence mode.
This paper proposes a novel approach using quantum tomography to reconstruct the spin density matrix of diboson systems, enabling the simultaneous and superior constraint of both CP-even and CP-violating SMEFT operators by exploiting full Beyond-Standard-Model signatures, including pure quadratic new physics terms that are typically degenerate in traditional polarisation-blind observables.
This paper revisits and clarifies the theoretical argument that MS-bar parton distribution functions remain non-negative within the perturbative region, addressing recent findings of negativity at low scales and providing an estimate for the threshold scale above which positivity is guaranteed.
Using a sample of 10 billion events collected by the BESIII detector, this study presents improved measurements of the branching fractions for and , establishes an upper limit for the rare decay , and reports the first extraction of the doubly virtual isovector form factor from an amplitude analysis of .