1402 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 introduces a novel Log Gaussian Cox Process (LGCP) method for modeling smooth backgrounds in high energy physics that minimizes assumptions about the underlying shape by utilizing a Gaussian process for the intensity function and Markov Chain Monte Carlo for optimization, demonstrating its effectiveness through synthetic experiments against traditional analytic functional forms.
This paper investigates exclusive semileptonic decays to ground and excited light mesons within a relativistic quark model to determine the CKM matrix element in agreement with inclusive data, while providing predictions for branching fractions of excited states that are potentially measurable at current and future factories.
The paper proposes the ITACA apparatus, which enhances gas xenon time projection chambers for neutrinoless double-beta decay searches by introducing trace ammonia to create slow-drifting ammonium ions, enabling high-resolution ion-track imaging that complements electron tracking to significantly improve background rejection through superior topological discrimination.
Using a large sample of events collected by the BESIII detector, this study presents the first absolute measurements of the and branching fractions, which significantly deviate from previous PDG values and provide strong evidence () for the presence of a transition amplitude in hyperon decays, challenging the strict validity of the rule.
This paper systematically classifies dimension-six baryon-number-violating SMEFT operators under various flavor-symmetry assumptions, demonstrating how their interplay with neutrino masses can allow for multi-TeV BNV scales consistent with proton decay constraints, while also identifying UV completions where the effective field theory description may be insufficient.
This study estimates a 1.3% statistical uncertainty on the cross-section measurement of the process at a 10 TeV Muon Collider by utilizing the TauFinder algorithm for efficient hadronic tau reconstruction and comparing results with other future collider sensitivities.
This paper presents a new angular-resolved reflectance measurement system operating in a gaseous argon atmosphere that characterizes aluminum and stainless steel materials relevant to DUNE, revealing significantly lower vacuum ultraviolet reflectance (10–15%) compared to UV-VIS values and providing critical data for optimizing future noble gas detector simulations.
This paper demonstrates that the analytic structure of partonic calculations for transitions, including anomalous thresholds arising from triangle topologies, fully matches the expectations from hadronic degrees of freedom, thereby validating the use of perturbative operator product expansions to constrain nonlocal charm-loop effects in rare -meson decays.
This paper proposes that dark particles with lepton-flavor-violating couplings to the tau lepton can trigger decay cascades resulting in rare, high-multiplicity neutrinoless tau decays (such as or ) that dominate over traditional three-body signatures and offer new experimental search channels across various dark sector models.
The STAR experiment at RHIC presents high-statistics femtoscopy results from Isobar and Au+Au collisions, revealing an attractive interaction in - pairs and a bound state in - pairs through the analysis of final-state correlations.