Measurement of the energy dependence of the $e^+ e^{\mathstrut -}\to B\bar{B}$, ${B}\bar{B}{}^*$ and ${B}{}^*\bar{B}{}^*$ cross sections at Belle II

Abstract We report measurements of the $e^+e^- \to B\bar{B}$, $B\bar{B}{}^*$, and $B^*\bar{B}{}^*$ cross sections at four energies, 10653, 10701, 10746 and 10805 MeV, using data collected by the Belle~II experiment. We reconstruct one $B$ meson in a large number of hadronic final states and use its momentum to identify the production process. In the first $2-5$ MeV above $B^*\bar{B}{}^*$ threshold, the $e^+e^- \to B^*\bar{B}{}^*$ cross section increases rapidly. This may indicate the presence of a pole close to the threshold.
Tags
Working group Quarkonium
Principal authors @  Alexander Bondar, Roman Mizuk, Sergey Privalov
Reference JHEP 10, 114 (2024), DOI: 10.1007/JHEP10(2024)114
Document BELLE2-PUB-PH-2023-016
Links arXiv:2405.18928, Inspire, JHEP
Bibtex 
@article{Belle-II:2024niz,
    author = "Adachi, I. and others",
    collaboration = "Belle-II",
    title = "{Measurement of the energy dependence of the e$^{+}$e$^{−}${\textrightarrow}$ B\overline{B} $, $ B{\overline{B}}^{\ast } $, and $ {B}^{\ast }{\overline{B}}^{\ast } $ cross sections at Belle II}",
    eprint = "2405.18928",
    archivePrefix = "arXiv",
    primaryClass = "hep-ex",
    reportNumber = "Belle II Preprint 2024-016, KEK Preprint 2024-12",
    doi = "10.1007/JHEP10(2024)114",
    journal = "JHEP",
    volume = "10",
    pages = "114",
    year = "2024"
}