Measurement of the charm-mixing parameter $y_{CP}$ in $D^{0}\to K^{0}_{S}\omega$ decays at Belle
Belle Collaboration,Nayak M.,Cinabro D.,Adachi I.,Aihara H.,Said S. Al,Asner D. M.,Atmacan H.,Aushev T.,Ayad R.,Babu V.,Bahinipati S.,Behera P.,Beleño C.,Bennett J.,Bhardwaj V.,Bhuyan B.,Biswal J.,Bonvicini G.,Bozek A.,Bračko M.,Browder T. E.,Campajola M.,Cao L.,Červenkov D.,Chen A.,Cheon B. G.,Chilikin K.,Cho H. E.,Cho K.,Choi S. -K.,Choi Y.,Choudhury S.,Cunliffe S.,Dash N.,De Nardo G.,Di Capua F.,Di Carlo S.,Doležal Z.,Dong T. V.,Eidelman S.,Epifanov D.,Fast J. E.,Ferber T.,Ferlewicz D.,Fulsom B. G.,Garg R.,Gaur V.,Gabyshev N.,Garmash A.,Giri A.,Goldenzweig P.,Golob B.,Grzymkowska O.,Hara T.,Hayasaka K.,Hayashii H.,Hou W. -S.,Hsu C. -L.,Inami K.,Inguglia G.,Ishikawa A.,Itoh R.,Iwasaki M.,Iwasaki Y.,Jacobs W. W.,Jeon H. B.,Jia S.,Jin Y.,Joo K. K.,Kaliyar A. B.,Kang K. H.,Karyan G.,Kawasaki T.,Kiesling C.,Kim B. H.,Kim C. H.,Kim D. Y.,Kim S. H.,Korpar S.,Kotchetkov D.,Križan P.,Kroeger R.,Krokovny P.,Kuhr T.,Kumar R.,Kwon Y. -J.,Lee S. C.,Li L. K.,Li Y. B.,Gioi L. Li,Libby J.,Lieret K.,Liventsev D.,Masuda M.,Matsuda T.,Matvienko D.,Merola M.,Miyabayashi K.,Mizuk R.,Mohanty G. B.,Moon T. J.,Mussa R.,Nakao M.,Natkaniec Z.,Niiyama M.,Nisar N. K.,Nishida S.,Nishimura K.,Ogawa K.,Ogawa S.,Ono H.,Pakhlov P.,Pakhlova G.,Pardi S.,Park H.,Park S. -H.,Patra S.,Paul S.,Pestotnik R.,Piilonen L. E.,Podobnik T.,Popov V.,Prencipe E.,Prim M. T.,Resmi P. K.,Ritter M.,Rostomyan A.,Rout N.,Russo G.,Sahoo D.,Sakai Y.,Sandilya S.,Sanuki T.,Savinov V.,Schneider O.,Schnell G.,Schueler J.,Schwanda C.,Schwartz A. J.,Seino Y.,Senyo K.,Sevior M. E.,Shebalin V.,Shiu J. -G.,Sokolov A.,Solovieva E.,Stanič S.,Starič M.,Stottler Z. S.,Strube J. F.,Sumiyoshi T.,Takizawa M.,Tamponi U.,Tanida K.,Tenchini F.,Trabelsi K.,Uchida M.,Uglov T.,Unno Y.,Uno S.,Urquijo P.,Ushiroda Y.,Usov Y.,Van Tonder R.,Varner G.,Varvell K. E.,Vinokurova A.,Vossen A.,Wang C. H.,Wang M. -Z.,Wang P.,Wang X. L.,Watanabe M.,Won E.,Xu X.,Yang S. B.,Ye H.,Zhang Z. P.,Zhilich V.,Zhukova V.,Zhulanov V.
arxiv（2019）
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摘要
We report the first measurement of the charm-mixing parameter $y_{CP}$ in $D^{0}$ decays to the $CP$-odd final state $K^{0}_{S}\omega$. The study uses the full Belle $e^{+}e^-$ annihilation data sample of $976\rm~ fb^{-1}$ taken at or near the $\Upsilon(4S)$ 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 $CP$-even decays in the data sample.
