7 papers
Search for the decay
Belle, Belle II Collaborations, : +432
We present the first search for decays. We look for signal decays in events produced in asymmetric-energy electron-positron collisions.…
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…
Observation of the radiative decay
Belle II Collaboration, M. Abumusabh, I. Adachi +367
We observe the radiative decay for the first time, with a significance exceeding standard deviations. The signal is found in the conti…
Improved measurement of Born cross sections for and ( = 0, 1, 2) at Belle and Belle II
Belle, Belle II Collaborations, : +424
We study the processes and ( = 0, 1, 2) at center-of-mass energies from 10.73 to 11.02 GeV using a $142.5\,\mathr…
Measurements of the absolute branching fractions of the hadronic decays
BESIII Collaboration, M. Ablikim, M. N. Achasov +722
Based on 4.5 fb of collision data collected at center-of-mass energies between 4599.53 MeV and 4698.82 MeV with the BESIII detector, the absolute branching fraction…
Measurement of decays at Belle II
Belle II Collaboration, I. Adachi, L. Aggarwal +451
We present measurements of decays using of data collected from 2019 to 2022 by the Belle~II experiment at the SuperKEKB asymmetric-energ…