Measurement of the branching fraction and CP-violating asymmetry of the decay B0 → π0π0 using 387 million Γ(4S) decays in Belle II data

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10510913" target="_blank" >RIV/00216208:11320/25:10510913 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=vp7ZDcHLi4" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=vp7ZDcHLi4</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevD.111.L071102" target="_blank" >10.1103/PhysRevD.111.L071102</a>

Result language
angličtina
Original language name
Measurement of the branching fraction and CP-violating asymmetry of the decay B0 → π0π0 using 387 million Γ(4S) decays in Belle II data
Original language description
We measure the branching fraction and CP-violating flavor-dependent rate asymmetry of B-0 -> pi(0)pi(0) decays reconstructed using the Belle II detector in an electron-positron collision sample containing 387 x 10(6) Gamma(4S) mesons. Using an optimized event selection, we find 125 +/- 20 signal decays in a fit to background-discriminating and flavor-sensitive distributions. The resulting branching fraction is (1.25 +/- 0.23) x 10(-6) and the CP-violating asymmetry is 0.03 +/- 0.30.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10300 - Physical sciences

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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