Measurement of the charm-mixing parameter yCP in D0 → KS0 ω decays at Belle

M. Nayak,D. Cinabro,Iki Adachi,H. Aihara,Al Said S,Asner D.M,H. Atmacan,Tagir Aushev,R. Ayad, Babu,S. Bahinipati,Prafulla Kumar Behera,J. Bennett, Bhardwaj,B. Bhuyan,Jyoti Prakash Biswal,G. Bonvicini,A. Bozek, Bra ko M,Browder T.E,M. Campajola,L. Cao, ervenkov D,A. Chen,Cheon B.G,K. Chilikin,Cho H.E,K. Cho,Choi S.-K.,Y. Choi,Sayantan Choudhury,S. Cunliffe,N. Dash,De Nardo G,Di Capua F,Di Carlo S,Dole al Z,Dong T.V,Semen Eidelman,D. Epifanov,Fast J.E,T. Ferber,D. Ferlewicz,Fulsom B.G,R. Garg, Gaur,N. Gabyshev,A. Garmash,Anjan K. Giri,P. Goldenzweig,B. Golob,O. Grzymkowska,T. Hara,K. Hayasaka,H. Hayashii,Hou W.-S.,Hsu C.-L.,K. Inami,G. Inguglia,A. Ishikawa,R. Itoh,M. Iwasaki,Y. Iwasaki,Jacobs W.W,Jeon H.B,S. Jia,Y. Jin,Joo K.K,Kaliyar A.B,Kang K.H,G. Karyan,T. Kawasaki,C. Kiesling,Kim B.H,Kim C.H,Kim D.Y,Kim S.H,Samo Korpar,D. Kotchetkov, Kri an P,R. Kroeger,Pavel Krokovny,T. Kuhr,Rajesh Kumar,Kwon Y.-J.,Lee S.C,Li L. K.,Li Y. B.,Li Gioi L,J. Libby,K. Lieret,D. Liventsev,M. Masuda,T. Matsuda,D. Matvienko,M. Merola,K. Miyabayashi,R. Mizuk,Mohanty G.B,Moon T.J

Physical Review D（2020）

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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 K0¦Sω. The study uses the full Belle e$^{+}$e$^{-}$ annihilation data sample of 976 fb$^{-1}$ taken at or near the Υ(4S) centre-of-mass energy. We find y$_{CP}$=(0.96±0.91±0.62(+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.

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xmlnsmml=http//wwww3org/1998/math/mathml,charm-mixing

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