Measurement of branching fraction and search for violation in

Mohanty, S.*; Tanida, Kiyoshi ; Belle Collaboration*; 184 of others*

We report the measurement of branching fractions and -violation asymmetries in decays based on a $711,{rm fb}^{-1}$ data sample containing events. The data were recorded at the resonance with the Belle detector at the KEKB asymmetric-energy collider. For , the branching fraction and -violation asymmetry measured below the $eta_{c}$ threshold ( $m_{phiphi} < 2.85,{rm GeV}/c^2$ ) are $[3.43^{,+,0.48}_{,-,0.46}({rm stat})pm 0.22({rm syst})] times10^{-6}$ and , respectively. Similarly, the branching fraction obtained for below the $eta_{c}$ threshold is $[3.02^{,+,0.75}_{,-,0.66} ({rm stat})pm ,0.20({rm syst})]times10^{-6}$ . We also measure the -violation asymmetry for within the $eta_{c}$ region ( $m_{phiphi}in [2.94,3.02],{rm GeV}/c^2$ ) to be .

Language	:	English
Journal	:	Physical Review D
Volume	:	103
Number	:	5
Pages	:	p.052013_1 - 052013_9
Publication Year/Month	:	2021/03
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Paper URL	:	https://doi.org/10.1103/PhysRevD.103.052013
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Cooperating Institute	:	高エネルギー加速器研究機構

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Registration No. : AA20220152
JAEA Abstracts No. : 50000722
Paper Submission No. : 25452

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