activity
20242026
collaborators

6 papers

hep-ex2026

Test of lepton flavor universality with measurements of and using semileptonic tagging at the Belle II experiment

Belle II Collaboration, I. Adachi, K. Adamczyk +450

We report measurements of the ratios of branching fractions ${\cal R}(D^{(*)+}) = \frac{{\cal B}(\overline{B}{}^0 \to D^{(*)+} \,τ^- \, \overlineν_τ)}{{\cal B}(\overline{B}{}^0…

hep-ex2025

Search for a Dark Higgs Boson Produced in Association with Inelastic Dark Matter at the Belle II Experiment

Belle II Collaboration, I. Adachi, L. Aggarwal +437

Inelastic dark matter models that have two dark matter particles and a massive dark photon can reproduce the observed relic dark matter density without violating cosmological limit…

hep-ex2025

Charged-hadron identification at Belle II

Belle II Collaboration, I. Adachi, H. Ahmed +408

The Belle II experiment's ability to identify particles critically affects the sensitivity of its measurements. We describe Belle II's algorithms for identifying charged particles…

hep-ex2025

Search for an Axion-Like Particle in Decays at Belle

Belle, Belle II Collaborations, : +422

We report a search for an axion-like particle in decays using data collected with the Belle detector at the KEKB asymmetric energy el…

hep-ex2025

Measurement of the lifetime

Belle II Collaboration, F. Abudinén, L. Aggarwal +360

An absolute measurement of the lifetime is reported using decays in events reconstructed from data collected by the Belle II experiment at t…

hep-ex2024

Search for lepton flavor-violating decay modes with hadronic -tagging at Belle and Belle II

Belle, Belle II Collaborations, : +425

We present the first search for the lepton flavor-violating decay modes using the 711 fb and 365 fb data samples…