Measurement of B → K*(892)γ decays at Belle II

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10510988" target="_blank" >RIV/00216208:11320/25:10510988 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=TB6Oq9axBF" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=TB6Oq9axBF</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP09(2025)024" target="_blank" >10.1007/JHEP09(2025)024</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurement of B → K*(892)γ decays at Belle II

Popis výsledku v původním jazyce

We present measurements of B -&gt; K*(892)gamma decays using 365 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 +/- 6) x 106 Upsilon(4S) events. We measure branching fractions (documentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$$mathcal{B}$$end{document}) and CP asymmetries (documentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$${mathcal{A}}_{CP}$$end{document}) for both B0 -&gt; K*0 gamma and B+-&gt; K*+gamma decays. The difference in CP asymmetries (documentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$$Delta {mathcal{A}}_{CP}$$end{document}) and the isospin asymmetry (triangle 0+) between these neutral and charged channels are also measured. We obtain the following branching fractions and CP asymmetries: documentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$$mathcal{B}left({B}&lt;^&gt;{0}to {K}&lt;^&gt;{*0}gamma right)=left(4.14pm 0.10pm 0.11right)times {10}&lt;^&gt;{-5}$$end{document}, documentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$$mathcal{B}left({B}&lt;^&gt;{+}to {K}&lt;^&gt;{*+}gamma right)=left(4.04pm {0.13}_{-0.15}&lt;^&gt;{+0.13}right)times {10}&lt;^&gt;{-5}$$end{document}, documentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$${mathcal{A}}_{CP}left({B}&lt;^&gt;{0}to {K}&lt;^&gt;{*0}gamma right)=left(-3.3pm 2.3pm 0.4right)%$$end{document}, and documentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$${Delta}{mathcal{A}}_{CP}left({B}&lt;^&gt;{+}to {K}&lt;^&gt;{*+}gamma right)=left(-0.7pm 2.9pm 0.5right)%$$end{document}. The measured difference in CP asymmetries is documentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$${Delta}{mathcal{A}}_{CP}=left(+{2}.{6}pm {3}.{8}pm 0.{6}right)%$$end{document}, and the measured isospin asymmetry is triangle 0+ = (+4.8 +/- 2.0 +/- 1.8)%. The first uncertainties listed are statistical and the second are systematic. These results are consistent with world-average values and theory predictions.

Název v anglickém jazyce

Measurement of B → K*(892)γ decays at Belle II

Popis výsledku anglicky

We present measurements of B -&gt; K*(892)gamma decays using 365 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 +/- 6) x 106 Upsilon(4S) events. We measure branching fractions (documentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$$mathcal{B}$$end{document}) and CP asymmetries (documentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$${mathcal{A}}_{CP}$$end{document}) for both B0 -&gt; K*0 gamma and B+-&gt; K*+gamma decays. The difference in CP asymmetries (documentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$$Delta {mathcal{A}}_{CP}$$end{document}) and the isospin asymmetry (triangle 0+) between these neutral and charged channels are also measured. We obtain the following branching fractions and CP asymmetries: documentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$$mathcal{B}left({B}&lt;^&gt;{0}to {K}&lt;^&gt;{*0}gamma right)=left(4.14pm 0.10pm 0.11right)times {10}&lt;^&gt;{-5}$$end{document}, documentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$$mathcal{B}left({B}&lt;^&gt;{+}to {K}&lt;^&gt;{*+}gamma right)=left(4.04pm {0.13}_{-0.15}&lt;^&gt;{+0.13}right)times {10}&lt;^&gt;{-5}$$end{document}, documentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$${mathcal{A}}_{CP}left({B}&lt;^&gt;{0}to {K}&lt;^&gt;{*0}gamma right)=left(-3.3pm 2.3pm 0.4right)%$$end{document}, and documentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$${Delta}{mathcal{A}}_{CP}left({B}&lt;^&gt;{+}to {K}&lt;^&gt;{*+}gamma right)=left(-0.7pm 2.9pm 0.5right)%$$end{document}. The measured difference in CP asymmetries is documentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$${Delta}{mathcal{A}}_{CP}=left(+{2}.{6}pm {3}.{8}pm 0.{6}right)%$$end{document}, and the measured isospin asymmetry is triangle 0+ = (+4.8 +/- 2.0 +/- 1.8)%. The first uncertainties listed are statistical and the second are systematic. These results are consistent with world-average values and theory predictions.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10300 - Physical sciences

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of High Energy Physics

ISSN

1029-8479

e-ISSN

1029-8479

Svazek periodika

2025

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

20

Strana od-do

24

Kód UT WoS článku

001579008900001

EID výsledku v databázi Scopus

2-s2.0-105017164366