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.
This paper presents measurements of identical charged-kaon femtoscopic correlations in Pb-Pb collisions at TeV, revealing that the source radii decrease with collision centrality and pair transverse momentum—a signature of collective flow well-described by hydrokinetic models—while also showing that kaons are emitted earlier in more peripheral events.
This paper improves upon previous estimates of energy released as "scalar tsunamis" when black holes form by incorporating general relativistic effects and refined initial field modeling, finding that while the total energy remains comparable to flat space predictions, the resulting spectrum undergoes significant corrections.
This paper analyzes Belle II data to demonstrate that a light invisible resonance with a mass of approximately 2.1 GeV provides a compelling and statistically significant explanation for the observed excess in decays, strongly favoring a new-physics hypothesis over the Standard Model alone.
This paper presents the CMS experiment's model-independent search for new physics using machine-learning-based anomaly detection on 138 fb of 13 TeV data, highlighting the successful unsupervised recovery of top quarks and the real-time deployment of unsupervised algorithms in the level-1 trigger during 2024.
This paper introduces Hypothesis-awkward, a library of property-based testing strategies that automatically generates diverse nested and variable-length data to uncover bugs in Awkward Array and related tools, having already identified 38 issues through continuous integration testing.
This paper demonstrates that correcting a mismatch between helicity and isospin conventions in the analysis of decays reduces the tension between the direct and indirect determinations of the unitarity-triangle angle from to , yielding a revised direct measurement of .
This paper introduces a tokenized multi-modal foundation model that unifies various collider reconstruction and simulation tasks into a single framework, enabling the generation of diverse intermediate physics objects through flexible prompt-based modality mapping while achieving state-of-the-art performance and Geant4-level fidelity.
This essay evaluates various hydrogen pathways for powering the Future Circular Collider (FCC) with low-carbon electricity, concluding that while no single solution is currently ready, CERN could accelerate the development of viable options by acting as a credible long-term customer.
This paper proposes that the 248 keV nuclear-recoil event observed by LZ can be explained by Majoron-mediated elastic dark matter scattering, a mechanism that naturally links neutrino mass generation to the signal while simultaneously reproducing the observed thermal relic abundance and suppressing solar capture through specific spin and kinematic properties.
This paper reviews the latest results from the Belle and Belle II experiments searching for charged lepton flavor violation (CLFV) in lepton, meson, and bottomonium decays, which are predicted by various new physics models to occur at rates accessible to current experiments despite being unobservably rare in the minimal Standard Model extension with massive neutrinos.