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 proposes and analyzes a new massive, optically levitated quantum sensor (MOLeQuTE) designed to detect feeble oscillatory forces from ultralight dark matter, demonstrating its potential to operate at the standard quantum limit and significantly advance existing sensitivity limits for vector B-L dark matter.
Using 138 fb of 13 TeV proton-proton collision data, the CMS experiment presents the first direct test of composite Higgs models and the first off-shell constraint on the Higgs self-coupling, while providing the tightest model-independent limits on light-quark Yukawa couplings and a precise measurement of the Higgs boson width of 5.1 MeV.
This paper investigates the impact of a novel flavor-mixing interaction arising from vacuum polarization on the parton distribution functions of charged kaons and pions within the U(3) Nambu--Jona-Lasinio model, demonstrating that these mixing effects, which are proportional to quark effective mass differences, significantly improve the agreement of theoretical predictions with experimental data at specific momentum fractions.
Using 20.3 fb of collision data collected by the BESIII detector, this study presents the most precise measurements to date of branching fractions, partial decay rates, and forward-backward asymmetries for the semileptonic decays and (), from which the product is determined and used to extract the CKM matrix element and the form factor while also testing lepton flavor universality and searching for scalar current contributions.
Using 20.3 fb of collision data collected by the BESIII detector, this study precisely measures the branching fractions and decay dynamics of decays, confirming lepton flavor universality, determining the product with unprecedented precision, and extracting improved values for and the scalar current contribution for the first time.
Motivated by the recent observation of toponium (), this paper phenomenologically investigates the decay channel at the High-Luminosity LHC, predicting that tens of clean dilepton events could be observed and proposing this -jet-free signature as a sensitive probe for future studies.
This paper investigates the feasibility of integrating Julia into existing High-Energy Physics C++ codebases by presenting a case study on statically compiling the JetReconstruction.jl package, comparing the performance of Julia v1.12's new static compilation feature against PackageCompiler.jl, native Julia, and C++ FastJet.
This paper evaluates the Light Dark Matter eXperiment's (LDMX) projected 5 discovery potential and model selection capabilities for light dark matter mediated by a dark photon, demonstrating that a two-dimensional likelihood-based analysis of recoil electron distributions can effectively distinguish between competing dark sector hypotheses and accurately infer model parameters.
This paper computes next-to-leading order FsQED corrections to the radiative pion pair production process , compares these results with alternative theoretical approaches and previous models, and implements the findings along with additional structure-dependent mechanisms into the BabaYaga@NLO Monte Carlo generator to improve the precision of radiative return measurements at flavor factories.
This paper demonstrates that by marginalizing over evolving dark energy parameters or utilizing a late-Universe-free approach combining primary CMB and lensing data, cosmic neutrino mass bounds can be made robust against dark energy model uncertainties, yielding relaxed limits (e.g., eV) that remain competitive with next-generation laboratory experiments like Project 8.