首页|Measurement of time-dependent $CP$ violation in $B^0 \to K^0_S \pi^0 \pi^0$ decays

Measurement of time-dependent $CP$ violation in $B^0 \to K^0_S \pi^0 \pi^0$ decays

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英文摘要

We report a measurement of time-dependent $CP$ violation in $B^0 \to K^0_S \pi^0 \pi^0$ decays using a data sample of $772 \times 10^6$ $B\bar{B}$ pairs collected by the Belle experiment runnin g at the $\Upsilon (4S)$ resonance at the KEKB $e^+ e^-$ collider. This decay proceeds mainly via a $b\to sd\bar{d}$ "penguin" amplitude. The results are $\sin 2\phi^{\rm eff}_1 = 0.92^{+0.27}_{-0.31}~$ (stat.) $\pm 0.11$ (syst.) and $\mathcal{A} = 0.28 \pm 0.21$ (stat.) $\pm 0.04$ (syst.), which are the most precise measurements of $CP$ violati on in this decay mode to date. The value for the $CP$-violating parameter $\sin 2\phi^{\rm eff}_1$ is consistent with that obtained using decay modes proceeding via a $b\to c\bar{c}s$ "tree" amplitude.

作者：L. Cao、W. W. Jacobs、I. S. Lee、K. Senyo、E. Won、S. Nishida、R. Garg、S. Uno、S. Jia、V. Aulchenko、K. Ogawa、Y. Choi、K. Hayasaka、G. Schnell、K. Inami、M. Bra?ko、Y. Usov、J. Biswal、V. Vorobyev、M. Iwasaki、A. Rostomyan、T. Uglov、G. B. Mohanty、V. Gaur、Belle Collaboration、A. J. Schwartz、A. M. Bakich、M. Takizawa、M. Lubej、O. Seon、S. Ogawa、K. E. Varvell、B. G. Fulsom、Z. P. Zhang、T. Nanut、N. K. Nisar、C. Schwanda、V. Savinov、S. Paul、S. Sandilya、B. Golob、A. Chen、D. Y. Kim、R. Mizuk、H. Ye、J. Haba、H. Atmacan、Y. B. Li、T. Luo、K. Miyabayashi、S. -K. Choi、P. Wang、E. Prencipe、J. Libby、T. Matsuda、T. Kawasaki、T. K. Pedlar、D. ?ervenkov、L. E. Piilonen、A. Ishikawa、N. Dash、S. Al Said、E. Waheed、S. H. Kim、B. Wang、Y. Iwasaki、J. H. Yin、K. Tanida、S. Eidelman、M. E. Sevior、A. Vossen、K. T. Kim、K. Nishimura、P. Goldenzweig、H. Miyata、E. Nakano、T. Aushev、V. Chekelian、V. Zhilich、G. Pakhlova、M. -Z. Wang、Y. Jin、H. Park、D. M. Asner、P. Kri?an、R. Kumar、T. Sanuki、A. Giri、S. Hirose、C. H. Wang、M. Masuda、V. Popov、S. Pardi、H. Aihara、T. Sumiyoshi、T. Kuhr、S. C. Lee、K. K. Joo、S. Di Carlo、K. Kinoshita、L. K. Li、T. V. Dong、K. J. Nath、C. Van Hulse、U. Tamponi、G. Varner、G. Russo、R. Pestotnik、J. B. Kim、Y. Sakai、T. -A. Shibata、H. Ono、B. Pal、D. Kotchetkov、L. Li Gioi、R. Ayad、B. Bhuyan、D. Epifanov、Y. Unno、V. Bansal、M. Merola、F. Tenchini、R. Van Tonder、J. -G. Shiu、P. Kody?、B. G. Cheon、S. Korpar、H. K. Moon、M. Uchida、Z. Natkaniec、K. Chilikin、V. Zhulanov、V. Babu、M. Sumihama、P. Behera、R. Kroeger、C. P. Shen、V. Bhardwaj、G. Inguglia、K. H. Kang、T. E. Browder、Y. Guan、I. Badhrees、Y. -J. Kwon、S. Cunliffe、O. Schneider、A. Bozek、Y. Ushiroda、Y. Seino、M. Stari?、S. Bahinipati、Y. Yusa、J. S. Lange、D. Liventsev、H. Hayashii、D. Cinabro、Z. Dr¨￠sal、J. E. Fast

作者单位：

DOI：10.1103/PhysRevD.99.011102

学科分类：物理学

推荐引用：L. Cao,W. W. Jacobs,I. S. Lee,K. Senyo,E. Won,S. Nishida,R. Garg,S. Uno,S. Jia,V. Aulchenko,K. Ogawa,Y. Choi,K. Hayasaka,G. Schnell,K. Inami,M. Bra?ko,Y. Usov,J. Biswal,V. Vorobyev,M. Iwasaki,A. Rostomyan,T. Uglov,G. B. Mohanty,V. Gaur,Belle Collaboration,A. J. Schwartz,A. M. Bakich,M. Takizawa,M. Lubej,O. Seon,S. Ogawa,K. E. Varvell,B. G. Fulsom,Z. P. Zhang,T. Nanut,N. K. Nisar,C. Schwanda,V. Savinov,S. Paul,S. Sandilya,B. Golob,A. Chen,D. Y. Kim,R. Mizuk,H. Ye,J. Haba,H. Atmacan,Y. B. Li,T. Luo,K. Miyabayashi,S. -K. Choi,P. Wang,E. Prencipe,J. Libby,T. Matsuda,T. Kawasaki,T. K. Pedlar,D. ?ervenkov,L. E. Piilonen,A. Ishikawa,N. Dash,S. Al Said,E. Waheed,S. H. Kim,B. Wang,Y. Iwasaki,J. H. Yin,K. Tanida,S. Eidelman,M. E. Sevior,A. Vossen,K. T. Kim,K. Nishimura,P. Goldenzweig,H. Miyata,E. Nakano,T. Aushev,V. Chekelian,V. Zhilich,G. Pakhlova,M. -Z. Wang,Y. Jin,H. Park,D. M. Asner,P. Kri?an,R. Kumar,T. Sanuki,A. Giri,S. Hirose,C. H. Wang,M. Masuda,V. Popov,S. Pardi,H. Aihara,T. Sumiyoshi,T. Kuhr,S. C. Lee,K. K. Joo,S. Di Carlo,K. Kinoshita,L. K. Li,T. V. Dong,K. J. Nath,C. Van Hulse,U. Tamponi,G. Varner,G. Russo,R. Pestotnik,J. B. Kim,Y. Sakai,T. -A. Shibata,H. Ono,B. Pal,D. Kotchetkov,L. Li Gioi,R. Ayad,B. Bhuyan,D. Epifanov,Y. Unno,V. Bansal,M. Merola,F. Tenchini,R. Van Tonder,J. -G. Shiu,P. Kody?,B. G. Cheon,S. Korpar,H. K. Moon,M. Uchida,Z. Natkaniec,K. Chilikin,V. Zhulanov,V. Babu,M. Sumihama,P. Behera,R. Kroeger,C. P. Shen,V. Bhardwaj,G. Inguglia,K. H. Kang,T. E. Browder,Y. Guan,I. Badhrees,Y. -J. Kwon,S. Cunliffe,O. Schneider,A. Bozek,Y. Ushiroda,Y. Seino,M. Stari?,S. Bahinipati,Y. Yusa,J. S. Lange,D. Liventsev,H. Hayashii,D. Cinabro,Z. Dr¨￠sal,J. E. Fast.Measurement of time-dependent $CP$ violation in $B^0 \to K^0_S \pi^0 \pi^0$ decays[EB/OL].(2018-10-08)[2025-08-02].https://arxiv.org/abs/1810.03336.点此复制

Measurement of time-dependent $CP$ violation in $B^0 \to K^0_S \pi^0 \pi^0$ decays

Measurement of time-dependent $CP$ violation in $B^0 \to K^0_S \pi^0 \pi^0$ decays

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