2503 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 7.33 fb of collision data collected by the BESIII detector, this study presents the first search for the radiative decay , finding no significant signal and establishing an upper limit on its branching fraction of at the 90% confidence level.
This paper provides a brief overview of tensor-polarized parton distribution functions and fragmentation functions for spin-1 hadrons, highlighting unique observables like the , structure functions and gluon transversity that offer insights into hadron dynamics beyond simple nucleon models.
This paper theoretically demonstrates that nuclear modifications to the longitudinal-transverse structure function ratio in the deuteron, arising from transverse Fermi motion, result in a few-percent effect that must be accounted for in high-energy nuclear data analysis and is expected to be confirmed by upcoming experiments at JLab.
This paper demonstrates that the SHiP experiment can distinguish the underlying production mechanisms of a feebly coupled axion-like particle decaying into diphotons by analyzing the kinematics of just a few reconstructed events, even in the presence of realistic detector effects.
This paper reviews three decades of progress in generalized parton distributions (GPDs), highlighting significant advancements in experimental measurements, sophisticated phenomenological analyses, theoretical refinements, and lattice QCD calculations that collectively enable three-dimensional nucleon tomography and a deeper understanding of the nucleon's mass, spin, and internal forces.
This paper investigates T-odd effects arising from two-photon exchange in semi-inclusive deeply inelastic scattering at low transverse momentum, demonstrating that while the absorptive part of the scattering amplitude is divergent, the resulting physical differential cross-section remains finite and exhibits distinct angular dependencies that offer new avenues for detecting effects beyond the one-photon approximation and searching for new physics.
This paper provides a comprehensive overview of the theoretical foundations and phenomenology of higher-twist effects in QCD, detailing their role in nonperturbative dynamics, their extraction from global DIS analyses, and future experimental opportunities at Jefferson Lab and the Electron-Ion Collider.
By reanalyzing BESII -value data within an unquenched charmonium framework that includes six vector states, this study resolves the puzzling upward mass shift of the by demonstrating that the observed enhancement near 4.19 GeV arises from coherent interference among nearby resonances rather than a genuine shift in the mass itself.
This paper employs a semirelativistic potential quark model to demonstrate that the hidden-charm pentaquark states observed by LHCb are predominantly hadronic molecules formed via - and -meson exchanges, successfully identifying the , , and as and bound states while offering a molecular interpretation for the despite a discrepancy in its predicted width.
This paper investigates the structure of the meson by calculating its valence-quark generalized parton distribution functions and form factors using a theoretical framework based on the exponential representation scheme combined with the modified chiral quark model, comparing the results with experimental data and other models.