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 complete next-to-leading order (NLO) calculation of the inseparable four-top ($tttt$) and three-top-plus-W ($tttW$) production processes at the LHC, introducing a novel window-removal prescription to resolve gauge invariance issues and demonstrating that joint predictions are essential for accurate experimental comparisons due to significant contributions from non-resonant components.
This paper presents next-to-next-to-leading order QCD predictions for double Higgs production in association with a vector boson () within both SMEFT and HEFT frameworks, providing inclusive cross-sections at LHC energies and analyzing how QCD corrections factorize differently for versus $Zhh$ channels due to the latter's gluon-induced component.
This paper introduces a B-decay tagged energy correlator (BTEC) to resolve the angular structure of energy flow in inclusive decays, deriving a factorization relation that incorporates a new measured quark jet function to enable closure tests of leading-power endpoint factorization and improve signal-background discrimination.
Using QCD light-cone sum rules, this study calculates the magnetic dipole moments of doubly-bottom molecular pentaquarks in various configurations, revealing that these moments are highly sensitive to the internal spin structure and quark composition, thereby offering a valuable tool for distinguishing between different molecular states in future experiments.
Using 140 fb⁻¹ of 13 TeV proton-proton collision data, the ATLAS collaboration searched for production in the decay mode and combined the results with previous searches to achieve the most precise measurement of production to date, yielding a signal strength of times the Standard Model prediction with an observed significance of 2.3 standard deviations.
This paper presents an independent assessment of the DALI prototype's sensitivity to axion-like particle dark matter, concluding that no electromagnetic modes below 12 GHz exhibit significant coupling to the axion field sufficient to explain the reported sensitivity, and offers recommendations for future dielectric haloscope experiments.
The ATLAS collaboration presents a search for high-mass spin-1 dilepton resonances using a combined dataset of 13 TeV and 13.6 TeV proton-proton collisions, finding no significant deviations from the Standard Model and setting the most stringent limits to date on various boson models, with mass exclusion limits reaching up to 5.5 TeV.
Using 140 fb of 13 TeV proton-proton collision data collected by the ATLAS detector, this study presents the first search for pair-produced vector-like quarks decaying into a top quark and a spin-0 particle that subsequently decays to diphotons, finding no significant excess over Standard Model backgrounds and setting model-independent upper limits on the production cross-section.
Using proton-proton collision data at 13 TeV collected by the CMS detector from 2016 to 2018, this study measures the Higgs boson mass in the diphoton decay channel to be 125.13 ± 0.15 GeV, achieving improved precision through refined calibration and new analysis techniques, and combines this result with previous measurements at 7 and 8 TeV to obtain a combined mass of 125.06 ± 0.14 GeV.
This paper presents the design, construction, and beam-test characterization of the CRILIN prototype, a high-granularity semi-homogeneous PbF crystal calorimeter read out by SiPMs, demonstrating its suitability for future lepton-collider experiments through excellent time resolution (below 20 ps at high energies), precise energy resolution, and effective longitudinal segmentation for shower correction.