2144 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 138 fb⁻¹ of 13 TeV and 35 fb⁻¹ of 13.6 TeV proton-proton collision data, this study presents the first search for beyond-the-Standard-Model resonances in four-top-quark production via the two-lepton channel, finding no significant excess and setting exclusion limits on various mediator models, including Z' bosons up to 850 GeV.
This paper investigates three types of new physics resonances that couple to Standard Model quarks through direct top-quark flavor-changing interactions, identifying the relevant SMEFT operators at the electroweak scale and analyzing their phenomenological implications.
This paper presents a global Bayesian analysis of unpolarized quark transverse-momentum-dependent parton distribution functions using Drell-Yan data at and accuracy, leveraging AI-driven functional form selection and machine-learning emulators to enable efficient Markov Chain Monte Carlo sampling and quantify uncertainties.
The ATLAS experiment measured the differential cross sections of coherent exclusive production in ultraperipheral Pb+Pb collisions at TeV using 2023 data, finding results consistent with theoretical predictions but in tension with previous Run-2 measurements in the central rapidity region.
This paper investigates the phenomenology of pseudo-Nambu-Goldstone bosons and light gauge bosons arising from the subgroup of a flavor model, demonstrating that their unsuppressed flavor-violating couplings allow low-energy flavor experiments to probe symmetry breaking scales up to GeV, surpassing current astrophysical limits.
This paper employs a light-front quark model based on the Bethe-Salpeter formalism to calculate the time-like electromagnetic form factors of , , and hyperons, demonstrating that the results, including effective form factors and the ratio of electric to magnetic form factors at specific values, closely match experimental data from the BESIII collaboration.
This paper reviews recent STAR experiment results on net-proton multiplicity fluctuations from RHIC BES-II collisions to search for the QCD critical point by comparing fourth-order cumulant and factorial cumulant ratios with non-critical theoretical models while addressing initial volume fluctuations and outlining future research directions.
This paper investigates the production and prompt decay of axion-like particles (ALPs) with lepton-flavour-violating couplings in the mass regime above the muon threshold, proposing new search strategies across meson, gauge boson, quarkonium, and tau decays to leverage the distinctive signature and assess the discovery potential of future high-energy and fixed-target experiments.
This paper demonstrates that the OmniLearned particle physics foundation model, pre-trained on high-energy collision data, can be effectively transferred to low-energy fixed-target neutrino experiments to outperform models trained from scratch on tasks like energy regression and pion classification, thereby validating the potential for detector-agnostic inference across vastly different energy scales and physics processes.
This paper utilizes QCD light-cone sum rules to calculate the electromagnetic multipole moments of -type strange hidden-charm pentaquarks, revealing distinct magnetic dipole, electric quadrupole, and magnetic octupole signatures that depend on diquark structure and provide key discriminants to differentiate between compact pentaquark and molecular interpretations.