Measurement of the charm-mixing parameter $y_{CP}$ in $D^{0}to K^{0}_{S}omega$ decays at Belle

Nayak, M.*; Tanida, Kiyoshi ; Belle Collaboration*; 180 of others*

We report the first measurement of the charm-mixing parameter $y_{CP}$ in $D^{0}$ decays to the -odd final state $K^{0}_{S}omega$ . The study uses the full Belle $e^{+}e^-$ annihilation data sample of $976rm~ fb^{-1}$ taken at or near the centre-of-mass energy. We find $y_{CP} = (0.96 pm 0.91 pm 0.61 {}^{+0.17}_{-0.00})%$ , where the first uncertainty is statistical, the second is systematic due to event selection and background, and the last is due to possible presence of -even decays in the data sample.

Language	:	English
Journal	:	Physical Review D
Volume	:	102
Number	:	7
Pages	:	p.071102_1 - 071102_8
Publication Year/Month	:	2020/10
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Paper URL	:	https://doi.org/10.1103/PhysRevD.102.071102
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Keywords	:	no keyword
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Article of JAEA R&D Review	:
Cooperating Institute	:	高エネルギー加速器研究機構

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Registration No. : AA20200917
JAEA Abstracts No. : 49000718
Paper Submission No. : 24328

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Measurement of the charm-mixing parameter in decays at Belle

Measurement of the charm-mixing parameter $y_{CP}$ in $D^{0}to K^{0}_{S}omega$ decays at Belle