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 details the fabrication status and expected performance of the thermally slumped borosilicate glass inner-core X-ray optic for the BabyIAXO experiment, highlighting optimized manufacturing techniques and metrology results that predict a half-power diameter of less than 90 arcseconds to significantly enhance signal-to-noise ratios.
This paper presents a lattice QCD calculation of nucleon unpolarized second Mellin moments using four physical-mass ensembles to determine the continuum-limit contributions of quarks and gluons to the proton's momentum, angular momentum, and orbital angular momentum.
This paper presents an ultrasonic positioning system for the Jiangmen Underground Neutrino Observatory that achieves centimeter-level accuracy in reconstructing calibration source coordinates by combining sound-speed modeling, waveform-based timing, and in-situ geometry calibration, thereby enabling precise off-axis calibration without interfering with photon collection or contaminating the liquid scintillator.
This paper demonstrates that non-linear material effects in modern neutrino detectors introduce significant interaction-model-dependent biases in calorimetric energy reconstruction—ranging from ~7–18 MeV across various experiments—which constitute a distinct systematic uncertainty that can be mitigated through hybrid reconstruction strategies.
Using a novel graph neural network algorithm on 138 fb of 13 TeV proton-proton collision data, the CMS collaboration performed the first search for pair-produced long-lived staus decaying within the tracker, setting new exclusion limits that improve upon previous results and extend the explored parameter space for gauge-mediated supersymmetry-breaking models.
This paper derives model-independent expansions to quantify and evaluate the leading corrections to the smoothness and on-shell approximations in femtoscopy and coalescence, finding that for typical LHC collision scenarios, these corrections are generally small (at or below the percent level) and often subdominant to other effects like the equal-time approximation.
Using a high-statistics 2018 dataset from the CMS experiment at = 13 TeV, this study measures production fraction ratios of B, B, and B mesons as functions of transverse momentum and rapidity via open-charm and charmonium decay channels, while also reporting improved branching fraction ratios and confirming isospin invariance in B meson production.
This paper reports on the 2019–2020 operation and performance of ProtoDUNE-DP, the largest dual-phase liquid argon time projection chamber built to date, which successfully validated key technologies like high-voltage delivery and photon detection despite significant technical challenges with its charge readout planes, ultimately informing improved designs for future vertical drift detectors.
This paper derives a nonlocal Time-Energy uncertainty principle and uses Thorium-229 nuclear clock data to establish conservative lower bounds on the nonlocality scale, demonstrating that nuclear clocks can probe non-Planckian nonlocality at energy scales ranging from tens of MeV to the TeV range.
This paper presents constraints on inelastic dark matter with large mass splittings (up to 510–780 keV) using a 32.4 g·day exposure from the RES-NOVA PbWO4 cryogenic detector, which extends direct-detection sensitivity beyond the reach of current xenon-based technologies by leveraging heavy nuclei and a broad recoil-energy range.