1442 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 paper introduces PhyGHT, a physics-guided hypergraph transformer equipped with a Pileup Suppression Gate to effectively filter extreme pileup noise and accurately reconstruct top-quark signals at the High-Luminosity Large Hadron Collider, outperforming existing state-of-the-art methods.
The CMS collaboration analyzed 138 fb of proton-proton collision data at 13 TeV to search for a heavy scalar resonance decaying to two Z bosons in the four-lepton final state, finding no significant excess over the Standard Model background and setting 95% confidence level upper limits on the production cross section across a mass range of 130 GeV to 3 TeV.
This study demonstrates that the directed flow () of charm quarks in asymmetric Cu+Au collisions is significantly enhanced compared to light hadrons and serves as a sensitive probe for both the initial spatial distribution of heavy quarks and temperature-dependent medium transport coefficients.
The paper proposes a novel "family-separated" solution to the canonical seesaw mechanism that establishes a direct correlation between the masses and mixing parameters of light and heavy Majorana neutrinos, thereby linking CP-violating effects in neutrino oscillations to heavy neutrino decays.
This LHCb study of meson production in NeNe and OO collisions at 5.36 TeV reveals a transverse momentum-dependent variation inconsistent with nuclear structure modifications alone, providing evidence for the onset of quark-gluon plasma formation in light-ion collisions.
This paper proposes a cost-effective beam-dump experiment at the CiADS facility to search for long-lived particles, specifically demonstrating that a 5-year run could probe currently unexcluded parameter spaces for dark photons with masses around 100 MeV and kinetic mixing between and , while also noting similar potential at the nearby HIAF.
This paper proposes and demonstrates a novel method for extracting the light quark mass ratio parameter from decays by mapping Dalitz plots to a unit disk to isolate symmetry breaking effects, yielding a preliminary result of consistent with previous determinations.
This paper proposes a novel method to detect light-quark Yukawa couplings to the Higgs boson by measuring unique azimuthal modulations in fragmentation products, termed Yukawa Fragmentation Asymmetries, which offer improved sensitivity and theoretical control compared to existing techniques.
This paper demonstrates that Vision Transformers, building on the CaloDREAM architecture, provide a universal, robust, and scalable solution for fast calorimeter simulations across diverse detector geometries, achieving Geant4-level accuracy with millisecond generation times and improved data efficiency through pretraining and fine-tuning.
Using 140 fb of 13 TeV proton-proton collision data collected by the ATLAS detector, this study presents a search for long-lived particles decaying into displaced opposite-charge lepton pairs, setting leading upper limits on production cross-sections for benchmark and -parity violating supersymmetric models without observing any candidate events.