Kavli Affiliate: T. Higuchi
| First 5 Authors: Belle II Collaboration, I. Adachi, L. Aggarwal, H. Ahmed, H. Aihara
| Summary:
We present measurements of $B to K{}^{*}(892)gamma$ decays using $365,{rm
fb}^{-1}$ of data collected from 2019 to 2022 by the Belle~II experiment at the
SuperKEKB asymmetric-energy $e^+e^-$ collider. The data sample contains $(387
pm 6) times 10^6$ $Boverline{B}$ events. We measure branching fractions
($mathcal{B}$) and $C!P$ asymmetries ($mathcal{A}_{C!P}$) for both
$B^{0}to K{}^{*0}gamma$ and $B^{+}to K{}^{*+}gamma$ decays. The difference
in $C!P$ asymmetries ($Delta mathcal{A}_{C!P}$) and the isospin asymmetry
($Delta_{0+}$) between these neutral and charged channels are also measured.
We obtain the following branching fractions and $C!P$ asymmetries:
$mathcal{B} (B^{0} to K{}^{*0}gamma) = (4.14 pm 0.10 pm 0.11 ) times
10^{-5}$, $mathcal{B} (B^{+} to K{}^{*+}gamma) = (4.02 pm 0.13 pm 0.13
)times 10^{-5}$, $mathcal{A}_{C!P} (B^{0} to K{}^{*0}gamma) = (-3.3 pm
2.3 pm 0.4 )%$, and $mathcal{A}_{C!P} (B^{+} to K{}^{*+}gamma) = (-0.7
pm 2.9 pm 0.6 )%$. The measured difference in $C!P$ asymmetries is $Delta
mathcal{A}_{C!P} = (+2.6 pm 3.8 pm 0.7 )%$, and the measured isospin
asymmetry is $Delta_{0+} = (+5.0 pm 2.0 pm 1.5 )%$. The first uncertainties
listed are statistical and the second are systematic. These results are
consistent with world-average values and theory predictions.
| Search Query: ArXiv Query: search_query=au:”T. Higuchi”&id_list=&start=0&max_results=3