2517 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.
The SIDDHARTA-2 collaboration successfully performed high-precision measurements of kaonic neon X-ray transitions at the DANE collider, demonstrating the feasibility of sub-eV spectroscopy with low-Z gaseous targets and providing critical data to refine theoretical models of de-excitation processes and test Quantum Electrodynamics in strange exotic atoms.
The LZ experiment analyzed 4.2 tonne-years of low-energy electron recoil data from its first two science runs to set the world's most stringent constraints to date on various new physics models, including solar axion-like particles, mirror dark matter, and neutrino millicharge, while finding no evidence of signals beyond the background-only hypothesis.
This study presents the first systematic QCD light-cone sum rule investigation of the electromagnetic multipole structure, including magnetic dipole, electric quadrupole, and magnetic octupole moments, for doubly strange hidden-charm pentaquarks with and , revealing significant sensitivity to internal color-spin correlations and charm-quark dominance while providing theoretical benchmarks for future experimental and lattice QCD validation.
This paper investigates exclusive electroproduction of quark and gluon dijets within the collinear factorization framework to probe generalized parton distributions, incorporating helicity contributions and elastic form factors while comparing predictions to HERA data and projecting future measurements for the Electron-Ion Collider.
This paper applies a Bayesian Markov Chain Monte Carlo approach to re-evaluate DUNE's long-baseline neutrino oscillation sensitivity using existing inputs, revealing enhanced octant sensitivity through post-hoc reactor constraints and presenting the first study of DUNE's sensitivity to the Jarlskog invariant.
The paper introduces **llm4smeft**, an open-source, locally runnable framework that combines a literature fine-tuned language model with retrieval-augmented generation to automate the selection of relevant SMEFT operators and their Fisher information for sparse global fits, thereby reducing reliance on manual theoretical insight.
This paper employs Born-Oppenheimer effective field theory to model quarkoniumlike states above open-flavor thresholds, revealing a spectrum organized by heavy-quark spin symmetry that includes both short-distance quarkonium resonances and long-distance molecular states, while providing multiplet assignments for experimental candidates and identifying the need for additional theoretical sectors to explain outliers.
Using finite-temperature and finite-density QCD sum rules, this study reveals that open-charm vector mesons ( and ) undergo substantial in-medium softening and significant reductions in their leptonic decay constants as baryon density increases, with the largest mass shifts reaching approximately and respectively, while finite density also lifts the vacuum degeneracy between particle and antiparticle states.
This paper demonstrates that the large size of pion-like excitations in the stringy fluid regime of QCD above the chiral symmetry restoration temperature is a model-independent phenomenon required by current algebra, arising from Pauli blocking effects that cause these mesons to swell significantly.
This paper demonstrates that double forward-proton tagging in photon fusion processes enables a decay-analyzer-independent measurement of the CP phase of spin-zero resonances by utilizing the measured proton recoil to determine photon polarization and observing the resulting shift in the second harmonic of the signed proton-proton azimuthal angle.