2527 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.
Using 140 fb of 13 TeV proton-proton collision data, the ATLAS experiment observes a significant excess near 6.9 GeV in the mass spectrum with a combined significance of 8.9, while finding no significant signal near 7.2 GeV and determining the ratio of partial decay widths between the and di- channels for the 6.9 GeV resonance.
This paper calculates inclusive -meson decay rates within the Mesogenesis framework using the Heavy Quark Expansion, revealing that subleading power-suppressed contributions can exceed the leading term in specific parameter regions, thereby exposing the limits of the expansion's validity while updating exclusive decay bounds and finding no new constraints from lifetime ratios.
This paper introduces Profile OmniFold, an extension of the machine learning-based OmniFold algorithm that incorporates nuisance parameters to handle uncertainties in detector simulations, demonstrated through both Gaussian examples and a CMS experiment case study.
This paper estimates constraints on the kinetic mixing parameter of sub-eV dark photons produced by thermal emission from Earth's core, demonstrating that current experiments like SENSEI and DAMIC-M already limit this parameter space while the proposed Oscura experiment could improve sensitivity by two to three orders of magnitude.
This paper describes the algorithms used by the Belle~II experiment to identify electrons and muons while distinguishing them from charged hadrons, presenting the performance results achieved during Run 1 using 428 fb of data collected at the SuperKEKB collider.
This paper reports on the design, production, and successful installation of the largest TPB-coated wavelength-shifting reflective system in a neutrino detector, which significantly enhances and homogenizes scintillation light collection for the Short-Baseline Near Detector.
This paper presents the first in situ cryogenic characterization of proton-damaged p-channel skipper CCDs, demonstrating that these sensors maintain excellent performance and radiation hardness equivalent to a decade at the Earth/Sun L2 Lagrange point, confirming their suitability for future photon-starved deep-space astronomical instruments.
This paper investigates how a new physics scale within the energy range of neutrino oscillation experiments can induce renormalization group running effects between production and detection, demonstrating that combining data from upcoming experiments like DUNE-ND, JUNO-TAO, and FASER2 offers strong sensitivity to disentangle these running parameters and resolve non-trivial degeneracies.
The CMS collaboration reports a landmark integrated luminosity measurement for 13 TeV proton-proton collisions at the LHC with a record-breaking precision of 0.73%, achieved by calibrating multiple monitors and validating them against Z boson production rates, thereby establishing a crucial sub-percent baseline for testing the Standard Model and future High-Luminosity LHC physics.
This paper describes the development, implementation, and performance evaluation of a dedicated High Multiplicity Trigger (HMT) in the CMS experiment during LHC Run 3, which significantly enhances sensitivity to long-lived particles by efficiently selecting events with unusually large numbers of hits in the muon detectors while maintaining stable operation under high-luminosity conditions.