activity
20242026
collaborators

6 papers

hep-ex2026

Search for axion-like particles decaying to two photons at Belle II

Belle II Collaboration, M. Abumusabh, I. Adachi +450

Axion-like particles (ALPs) are predicted in many extensions of the Standard Model and provide a well-motivated portal between visible and hidden sectors through their coupling to…

hep-ex2026

First measurement of the masses of the and states and the energy dependence of the cross sections for and

Belle, Belle II Collaborations, : +398

We study the processes and at center-of-mass energies =(10.73 -- 11.02) GeV using a data sampl…

hep-ex2026

Study of decays at Belle and Belle II

Belle, Belle II Collaborations, : +412

We report a measurement of the branching fraction for the leptonic decay . This work presents the first result using Belle~II data, an updated Be…

hep-ex2026

Study of via initial-state radiation at Belle~II

Belle II Collaboration, M. Abumusabh, I. Adachi +417

Using a data sample of 427.9 fb collected by the Belle~II detector at or near the and resonances, the cross sections for $(h=π/K…

hep-ex2025

Measurement of the time-integrated CP asymmetry in decays using Belle and Belle II data

Belle, Belle II Collaborations, : +360

We measure the time-integrated CP asymmetry in decays reconstructed in events collected by the Belle a…

hep-ex2024

Measurement of asymmetries in decays at Belle II

Belle II Collaboration, I. Adachi, L. Aggarwal +399

We describe a measurement of charge-parity () violation asymmetries in decays using Belle II data. We consider and $η'\toρ(\toπ^…