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arXiv · 2011.00793

Measurement of time-dependent CP violation parameters in $B^0 \to K_0^SK_0^SK_0^S$ decays at Belle

Belle Collaboration·K. H. Kang·H. Park·T. Higuchi·K. Miyabayashi·K. Sumisawa·I. Adachi·J. K. Ahn·H. Aihara·S. Al Said·D. M. Asner·V. Aulchenko·T. Aushev·R. Ayad·V. Babu·S. Bahinipati·A. M. Bakich·P. Behera·C. Beleño·J. Bennett·V. Bhardwaj·T. Bilka·J. Biswal·G. Bonvicini·A. Bozek·M. Bračko·T. E. Browder·M. Campajola·L. Cao·D. Červenkov·M. -C. Chang·V. Chekelian·A. Chen·B. G. Cheon·K. Chilikin·K. Cho·S. -K. Choi·Y. Choi·D. Cinabro·S. Cunliffe·N. Dash·G. De Nardo·Z. Doležal·T. V. Dong·S. Eidelman·J. E. Fast·T. Ferber·B. G. Fulsom·R. Garg·V. Gaur·N. Gabyshev·A. Garmash·A. Giri·P. Goldenzweig·B. Golob·D. Greenwald·Y. Guan·O. Hartbrich·K. Hayasaka·H. Hayashii·M. Hernandez Villanueva·W. -S. Hou·C. -L. Hsu·K. Inami·G. Inguglia·A. Ishikawa·M. Iwasaki·Y. Iwasaki·W. W. Jacobs·E. -J. Jang·H. B. Jeon·S. Jia·Y. Jin·K. K. Joo·A. B. Kaliyar·G. Karyan·T. Kawasaki·H. Kichimi·C. Kiesling·C. H. Kim·D. Y. Kim·K. -H. Kim·S. H. Kim·Y. -K. Kim·K. Kinoshita·P. Kodyš·S. Korpar·D. Kotchetkov·P. Križan·R. Kroeger·P. Krokovny·R. Kulasiri·R. Kumar·A. Kuzmin·Y. -J. Kwon·J. S. Lange·I. S. Lee·S. C. Lee·J. Li·L. K. Li
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Abstract

We measure the time-dependent $C\!P$ violation parameters in $B^{0} \to K^{0}_{S}K^{0}_{S}K^{0}_{S}$ decays using $772 \times 10^6$ $B {\mkern 1.5mu\overline{\mkern-1.5mu B \mkern-0.1mu}\mkern 0.1mu}$ pairs collected at the $\Upsilon (4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider. The obtained mixing-induced and direct $C\!P$ asymmetries are $-0.71 \pm 0.23~{\rm(stat)} \pm 0.05~{\rm(syst)}$ and $0.12 \pm 0.16~{\rm(stat)} \pm 0.05~{\rm(syst)}$, respectively. These values are consistent with the Standard Model predictions. The significance of $C\!P$ violation differs from zero by 2.5 standard deviations.

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Belle Collaboration, K. H. Kang, H. Park, T. Higuchi, K. Miyabayashi, K. Sumisawa, I. Adachi, J. K. Ahn, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, A. M. Bakich, P. Behera, C. Beleño, J. Bennett, V. Bhardwaj, T. Bilka, J. Biswal, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, L. Cao, D. Červenkov, M. -C. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. -K. Choi, Y. Choi, D. Cinabro, S. Cunliffe, N. Dash, G. De Nardo, Z. Doležal, T. V. Dong, S. Eidelman, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, D. Greenwald, Y. Guan, O. Hartbrich, K. Hayasaka, H. Hayashii, M. Hernandez Villanueva, W. -S. Hou, C. -L. Hsu, K. Inami, G. Inguglia, A. Ishikawa, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E. -J. Jang, H. B. Jeon, S. Jia, Y. Jin, K. K. Joo, A. B. Kaliyar, G. Karyan, T. Kawasaki, H. Kichimi, C. Kiesling, C. H. Kim, D. Y. Kim, K. -H. Kim, S. H. Kim, Y. -K. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. Križan, R. Kroeger, P. Krokovny, R. Kulasiri, R. Kumar, A. Kuzmin, Y. -J. Kwon, J. S. Lange, I. S. Lee, S. C. Lee, J. Li, L. K. Li. 2020-11-02. Measurement of time-dependent CP violation parameters in $B^0 \to K_0^SK_0^SK_0^S$ decays at Belle. https://doi.org/10.1103/physrevd.103.032003

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