1421 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 demonstrates that a vector-like fourth family of quarks induces a significant chiral enhancement in the process, leading to large deviations from Standard Model predictions that are most stringently constrained by the branching ratio of .
Using an off-shell coupled-channel formalism that relies exclusively on meson exchanges to exclude pre-existing poles, this study demonstrates that six charmonium-like tetraquark states with various spin-parities in the 3.6–4.3 GeV mass range, including the and candidates for the , are dynamically generated through coupled-channel dynamics, particularly involving the channel.
Using a novel method to tag antineutrons from decays within a sample of over 10 million events collected by the BESIII detector, researchers measured the cross sections for the inelastic scattering processes and to be mb and mb respectively, demonstrating the viability of this approach for future studies of antineutron-proton interactions.
Using data from the Belle and Belle II experiments, this paper reports the first search for the rare decay , finding no significant excess and setting an improved upper limit on its branching fraction of at the 90% confidence level.
This paper presents sensitivity projections for the NUCLEUS experiment at Chooz, demonstrating its potential to achieve a 4.7 observation of coherent elastic neutrino-nucleus scattering and provide leading constraints on new physics by utilizing gram-scale cryogenic calorimeters to access unprecedentedly low nuclear recoil energies.
This chapter introduces the fundamentals of the three-flavor neutrino oscillation paradigm, detailing the six undetermined oscillation parameters, the experimental history of the phenomenon, and the theoretical framework including matter effects that guide current large-scale particle physics experiments.
This paper presents a quantum machine learning approach using rotationally symmetric quanvolutional neural networks to classify track-like and shower-like topologies in LArTPC neutrino events, finding that while these quantum models outperform similarly sized classical networks, they are ultimately surpassed by classical models with significantly more parameters.
Using low-energy electronic recoil data from the first science run of the XENONnT detector and a novel model accounting for charge cancellation effects, researchers established world-leading constraints on spontaneous quantum collapse models that exclude the original parameters of the Continuous Spontaneous Localization theory for the first time.
This paper proposes enhancing the phenomenological application of the Boyd-Grinstein-Lebed -expansion for hadronic form factors by explicitly incorporating a unitarity filter derived from its equivalence to the Dispersion Matrix method and by introducing kernel functions to apply multiple dispersive bounds, thereby enabling more rigorous, model-independent analyses of various physical processes.
This paper extends a multiple dispersive bounds strategy to sub-threshold branch-cuts by modifying the standard -expansion to simultaneously incorporate pair-production and sub-threshold constraints, demonstrating through numerical analysis of the charged kaon form factor that this double-bound approach yields more precise extrapolations and greater stability against outer function choices than existing single-bound methodologies.