1429 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 a catalog of dark matter-nucleon scattering cross sections for various mediator types and derives projected constraints on sub-GeV boosted dark matter for the COSINUS experiment, demonstrating its potential to probe light dark matter masses despite higher energy thresholds.
Using a large sample of events collected by the BESIII detector, this study presents the first amplitude analysis of the isospin-violating decay , identifying dominant intermediate processes and achieving the first observation of radiative transitions to isospin-triplet scalar mesons , , and with a significantly improved measurement of the total branching fraction.
This paper presents projected sensitivity estimates showing that the KATRIN experiment, utilizing its upcoming TRISTAN detector upgrade, will be capable of probing keV-scale sterile neutrino mixing amplitudes down to for masses between 4 and 13 keV, significantly extending the reach of previous laboratory searches despite potential systematic uncertainties.
This paper employs the one-boson-exchange model with - wave mixing and coupled-channel dynamics to predict the existence of genuinely exotic, five-flavor molecular pentaquark candidates in the and systems, providing specific quantum number assignments and spin-splitting characteristics to guide future experimental searches at facilities like LHCb and Belle II.
This paper proposes a hybrid cryogenic detection system combining a dielectric haloscope, a Rydberg-atom transducer, and superconducting nanowire single-photon detectors to achieve QCD axion sensitivity in the previously unexplored terahertz frequency range by efficiently converting and up-converting ultralight dark matter signals.
This paper proposes a novel supervised contrastive metric learning approach for point cloud segmentation in highly granular detectors that outperforms object condensation by learning a stable latent representation to effectively separate overlapping particle showers, thereby improving reconstruction efficiency, purity, and energy resolution, especially in high-multiplicity regimes.
This paper presents a simultaneous fit to BESIII cross-section data for various charmonium-like final states above 4.4 GeV, determining the resonant parameters of four structures (, , , and ) and finding that the and dominantly drive the production of , , and channels.
Using 138 fb of proton-proton collision data at 13 TeV collected by the CMS detector, this study performs a comprehensive search for new particles decaying into top quark-antiquark pairs across all lepton final states, setting the most stringent limits to date on heavy Z' bosons, Kaluza-Klein gluons, dark-matter mediators, and two-Higgs-doublet model scalars.
Using the complete KamLAND-Zen 800 dataset with 745 kg of enriched xenon, the collaboration reports a new lower limit for the neutrinoless double-beta decay half-life of Xe exceeding years, which improves upon previous results by a factor of 1.7 and constrains the effective Majorana neutrino mass to the range of 28–122 meV.
This paper proposes a direct search for QCD axion dark matter using superconducting transmon qubits as quantum sensors, demonstrating that combining cavity resonance with entangled quantum circuits can enhance the detection signal to reach the parameter regions predicted by QCD axion models.