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          Institute: MPI für Physik     Collection: YB 2016     Display Documents

ID: 716480.0, MPI für Physik / YB 2016
Study of $\\mathbf{B^{0}\\rightarrow\\rho^{+}\\rho^{-}}$ decays and implications for the CKM angle $\\mathbf{\\phi_2}$
Authors:Vanhoefer, P.; Dalseno, J.; Kiesling, C.; Abdesselam, A.; Adachi, I.; Aihara, H.; Al Said, S.; Arinstein, K.; Asner, D. M.; Atmacan, H.; Aushev, T.; Aziz, T.; Babu, V.; Badhrees, I.; Bakich, A. M.; Bansal, V.; Barberio, E.; Behera, P.; Bhuyan, B.; Biswal, J.; Bobrov, A.; Bozek, A.; Bracko, M.; Browder, T. E.; Cervenkov, D.; Chang, P.; Chekelian, V.; Chen, A.; Cheon, B. G.; Chilikin, K.; Chistov, R.; Chobanova, V.; Choi, S. -K.; Choi, Y.; Cinabro, D.; Danilov, M.; Dash, N.; Dingfelder, J.; Dolezal, Z.; Drasal, Z.; Dutta, D.; Eidelman, S.; Farhat, H.; Fast, J. E.; Ferber, T.; Fulsom, B. G.; Gaur, V.; Gabyshev, N.; Garmash, A.; Gillard, R.; Goh, Y. M.; Goldenzweig, P.; Golob, B.; Greenwald, D.; Haba, J.; Hamer, P.; Hara, T.; Hayasaka, K.; Hayashii, H.; He, X. H.; Horiguchi, T.; Hou, W. -S.; Iijima, T.; Inami, K.; Ishikawa, A.; Itoh, R.; Iwasaki, Y.; Jacobs, W. W.; Jaegle, I.; Joffe, D.; Joo, K. K.; Julius, T.; Kang, K. H.; Kato, E.; Katrenko, P.; Kawasaki, T.; Kim, D. Y.; Kim, H. J.; Kim, J. B.; Kim, J. H.; Kim, K. T.; Kim, M. J.; Kim, S. H.; Kim, Y. J.; Kinoshita, K.; Ko, B. R.; Korpar, S.; Krizan, P.; Krokovny, P.; Kuhr, T.; Kumita, T.; Kuzmin, A.; Kwon, Y. -J.; Lee, I. S.; Li, L.; Li, Y.; Li Gioi, L.; Libby, J.; Liventsev, D.; Lukin, P.; Masuda, M.; Matvienko, D.; Miyabayashi, K.; Miyata, H.; Mizuk, R.; Mohanty, G. B.; Mohanty, S.; Moll, A.; Moon, H. K.; Mori, T.; Nakano, E.; Nakao, M.; Nanut, T.; Natkaniec, Z.; Nayak, .; Nisar, N. K.; Nishida, S.; Ogawa, S.; Okuno, S.; Pakhlov, P.; Pakhlova, G.; Pal, B.; Park, C. W.; Park, H.; Pedlar, T. K.; Pestotnik, R.; Petric, M.; Piilonen, L. E.; Pulvermacher, C.; Ribezl, E.; Ritter, M.; Rostomyan, A.; Sahoo, H.; Sakai, Y.; Sandilya, S.; Santelj, L.; Sanuki, T.; Sato, Y.; Savinov, V.; Schneider, O.; Schnell, G.; Schwanda, C.; Schwartz, A. J.; Seino, Y.; Senyo, K.; Seon, O.; Sevior, M. E.; Shebalin, V.; Shen, C. P.; Shibata, T. -A.; Shiu, J. -G.; Simon, F.; Sohn, Y. -S.; Sokolov, A.; Solovieva, E.; Staric, M.; Sumihama, M.; Sumiyoshi, T.; Tamponi, U.; Teramoto, Y.; Trabelsi, K.; Uchida, M.; Uglov, T.; Unno, Y.; Uno, S.; Usov, Y.; Van Hulse, C.; Varner, G.; Vinokurova, A.; Vossen, A.; Wagner, M. N.; Wang, C. H.; Wang, M. -Z.; Wang, P.; Watanabe, M.; Watanabe, Y.; Won, E.; Yamamoto, H.; Yamaoka, J.; Yashchenko, S.; Ye, H.; Yook, Y.; Yusa, Y.; Zhang, Z. P.; Zhilich, V.; Zhulanov, V.; Zupanc, A.
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:We present a measurement of the branching fraction and the longitudinal polarization fraction of $B^{0}\\rightarrow\\rho^+\\rho^-$ decays, as well as the time-dependent $CP$ violating parameters in decays into longitudinally polarized $\\rho^{+}\\rho^{-}$ pairs with Belle's final data set of $772\\times 10^6$ $B\\bar{B}$ pairs, at the $\\Upsilon(4S)$ resonance, collected at the asymmetric-energy $e^+ e^-$ collider KEKB. We obtain ${\\cal B}(B^0 \\rightarrow \\rho^+ \\rho^-)=(28.3\\pm 1.5\\;(\\rm stat) \\pm 1.5\\;(\\rm syst))\\times 10^{-6}$, $f_L = 0.988\\pm 0.012\\;(\\rm stat ) \\pm0.023\\;(\\rm syst)$, ${\\cal A}_{CP} = 0.00\\pm0.10\\;(\\rm stat ) \\pm0.06\\;(\\rm syst)$, ${\\cal S}_{CP} = -0.13\\pm0.15\\;(\\rm stat ) \\pm0.05\\;(\\rm syst).$ We perform an isospin analysis to constrain the CKM angle $\\phi_2$ and obtain two solutions with \\begin{eqnarray} \\phi_{2} = (93.7\\pm10.6)^{\\circ},\\nonumber \\end{eqnarray} being most compatible with other Standard-Model based fits to the data.
Classification / Thesaurus:Belle II
Comment of the Author/Creator:26 pages, 7 figures, submitted to PRD
Document Type:Article
Communicated by:MPI für Physik
Affiliations:MPI für Physik
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