2092 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 the CMD-3 detector at the VEPP-2000 collider, researchers analyzed 109.1 pb of data to report 4.5 evidence for the production of the C-even resonance in the reaction via two-photon interaction, measuring a production cross section of nb.
Using 9 fb⁻¹ of proton-proton collision data from the LHCb experiment, this study reports the first observation of decays, provides evidence for and decays, improves the precision of the measurement, and sets an upper limit on the channel, while also measuring a asymmetry compatible with zero in the mode.
This paper presents the first complete analysis of prompt double hadroproduction within the nonrelativistic-QCD framework, deriving a new set of long-distance matrix elements that successfully describe LHC data on pairs, single yields and polarization, and production, thereby providing a robust test of heavy-quark spin symmetry.
The NOvA experiment conducted a timing-based search for cosmic-ray magnetic monopoles using 2,743 live days of data from its surface Far Detector, finding no evidence of such particles and setting a new upper flux limit for low-mass monopoles ( GeV) in the speed range .
Motivated by recent experimental advancements, this paper systematically investigates light and charm meson M1 radiative transitions by calculating effective transition magnetic moments and decay widths using an effective mass scheme and a non-relativistic potential model, while highlighting the decisive role of higher-order QCD corrections and scale-dependent effects.
This paper introduces an amortized inference method using likelihood-weighted normalizing flows that overcomes the limitations of standard unimodal base distributions by initializing with a Gaussian Mixture Model, thereby accurately capturing multi-modal, non-Gaussian posteriors in high-dimensional inverse problems as demonstrated in multi-modal benchmarks and a heavy flavor physics application.
Using 138 fb of proton-proton collision data at = 13 TeV collected by the CMS detector, this study searches for heavy resonances decaying into two Higgs bosons in the final state, finding no evidence for new physics and setting the most sensitive limits to date on such production cross sections for masses between 1.4 and 4.5 TeV.
This paper proposes an composite model where Standard Model particles emerge as bound states, demonstrating that a specific flavor structure with two spurions can simultaneously reproduce all quark and lepton masses and the CKM matrix while predicting that electron electric dipole moments and neutral kaon mixing provide the most stringent constraints on the compositeness scale, potentially reaching up to TeV.
The LHCb collaboration measured meson production in O and OO collisions, finding that while O collisions show only slight suppression, OO collisions exhibit significant suppression of excited states consistent with quark-gluon plasma formation and color screening effects.
This paper provides an overview of hadron spectroscopy, highlighting how the discovery of exotic hadrons and advancements in experimental and computational techniques are expanding our understanding of Quantum Chromodynamics beyond the traditional quark model.