2551 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 100 fb of 13 TeV proton-proton collision data from the CMS experiment, this study presents a search for long-lived particles via displaced vertices with low-momentum tracks, setting the most stringent limits to date on top squark and wino-like neutralino masses in specific supersymmetric coannihilation scenarios.
This paper presents the first consistent, combined analysis of leptonic and hadronic final states for a model-independent measurement of the production cross section at the FCC-ee, achieving unprecedented statistical precisions of 0.31% at 240 GeV and 0.52% at 365 GeV using the recoil-mass method.
Using 138 fb of 13 TeV proton-proton collision data, the CMS experiment measured the Higgs boson total decay width to be 3.9 MeV via the H WW e channel, achieving a threefold improvement in uncertainty over previous results while confirming consistency with the Standard Model.
This paper presents the first search for heavy long-lived charged particles using novel level-1 trigger scouting data from 2024 CMS proton-proton collisions at = 13.6 TeV, establishing upper limits on production cross-sections and demonstrating a proof of concept for extending sensitivity to lower values through the analysis of particles interacting across multiple bunch crossings.
This paper investigates neural scaling laws for particle jet generation, confirming logarithmic scaling with model size and validating next-token prediction loss as a proxy for physical accuracy, while observing weaker scaling trends for dataset size and compute due to rapid saturation in autoregressive learning.
This paper proposes using the visible inelasticity of starting track events in neutrino telescopes as a complementary and immediately accessible method to statistically measure the tau flavor content of astrophysical neutrinos, offering competitive sensitivity with existing IceCube data.
This paper proposes that in specific extended scalar-sector scenarios near the alignment limit, higher-dimensional interactions and suppressed mixing can suppress conventional decay modes to make multi-Higgs final states (two to four Higgs bosons) the leading discovery channels for new physics at the LHC, with distinct kinematic features allowing differentiation between single-scalar and two-singlet realizations.
Using data from 102 million and 158 million decays collected by the Belle detector, researchers found no evidence for , , or dibaryon states and established the first 90% confidence-level upper limits on their production branching fractions at the level of –.
This paper presents lattice QCD results for the first four Mellin moments of the unpolarized parton distribution functions of the pion and kaon, computed using a physical-mass twisted mass fermion ensemble to reconstruct the valence PDFs and compare them with existing theoretical and phenomenological determinations.
This paper characterizes spurious charge in SENSEI Skipper-CCDs, identifying the serial register as the dominant background source during readout and demonstrating that a novel "tri-level" clocking scheme reduces single-electron density by a factor of approximately seven.