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Study of B-0 -> rho(0)rho(0) decays, implications for the CKM angle phi(2) and search for other B-0 decay modes with a four-pion final state
- Authors
- Vanhoefer, P.; Dalseno, J.; Kiesling, C.; Adachi, I.; Aihara, H.; Asner, D. M.; Aulchenko, V.; Aushev, T.; Bakich, A. M.; Bala, A.; Bhardwaj, V.; Bhuyan, B.; Bonvicini, G.; Bozek, A.; Bracko, M.; Browder, T. E.; Chang, M. -C.; Chang, P.; Chekelian, V.; Chen, A.; Chen, P.; Cheon, B. G.; Chilikin, K.; Chistov, R.; Cho, K.; Chobanova, V.; Choi, Y.; Cinabro, D.; Dolezal, Z.; Drasal, Z.; Eidelman, S.; Farhat, H.; Fast, J. E.; Ferber, T.; Gaur, V.; Gabyshev, N.; Ganguly, S.; Garmash, A.; Gillard, R.; Goh, Y. M.; Golob, B.; Hara, T.; Hayasaka, K.; Hayashii, H.; Higuchi, T.; Horii, Y.; Hoshi, Y.; Hou, W. -S.; Hyun, H. J.; Iijima, T.; Ishikawa, A.; Itoh, R.; Iwasaki, Y.; Iwashita, T.; Jaegle, I.; Julius, T.; Kah, D. H.; Kato, E.; Kawai, H.; Kawasaki, T.; Kim, D. Y.; Kim, H. O.; Kim, J. B.; Kim, J. H.; Kim, M. J.; Kim, Y. J.; Kinoshita, K.; Klucar, J.; Ko, B. R.; Korpar, S.; Krizan, P.; Krokovny, P.; Kronenbitter, B.; Kuhr, T.; Kumita, T.; Kuzmin, A.; Kwon, Y. -J.; Lange, J. S.; Lee, S. -H.; Li, J.; Gioi, L. Li; Libby, J.; Liu, C.; Liu, Y.; Liventsev, D.; Lukin, P.; Miyabayashi, K.; Miyata, H.; Mizuk, R.; Mohanty, G. B.; Moll, A.; Moser, H. -G.; Mussa, R.; Nakano, E.; Nakao, M.; Natkaniec, Z.; Nedelkovska, E.; Nisar, N. K.; Nishida, S.; Nitoh, O.; Ogawa, S.; Pakhlov, P.; Pakhlova, G.; Park, C. W.; Park, H.; Park, H. K.; Pedlar, T. K.; Pestotnik, R.; Petric, M.; Piilonen, L. E.; Ritter, M.; Roehrken, M.; Rostomyan, A.; Ryu, S.; Sahoo, H.; Saito, T.; Sakai, Y.; Sandilya, S.; Santelj, L.; Sanuki, T.; Sato, Y.; Savinov, V.; Schneider, O.; Schnell, G.; Schwanda, C.; Schwartz, A. J.; Semmler, D.; Senyo, K.; Seon, O.; Sevior, M. E.; Shapkin, M.; Shen, C. P.; Shibata, T. -A.; Shiu, J. -G.; Shwartz, B.; Sibidanov, A.; Simon, F.; Sohn, Y. -S.; Sokolov, A.; Solovieva, E.; Staric, M.; Steder, M.; Sumiyoshi, T.; Tamponi, U.; Tatishvili, G.; Teramoto, Y.; Trabelsi, K.; Tsuboyama, T.; Uchida, M.; Uehara, S.; Unno, Y.; Uno, S.; Vahsen, S. E.; Van Hulse, C.; Varner, G.; Varvell, K. E.; Vinokurova, A.; Vorobyev, V.; Wagner, M. N.; Wang, C. H.; Wang, M. -Z.; Wang, P.; Wang, X. L.; Watanabe, Y.; Williams, K. M.; Won, E.; Yamashita, Y.; Yashchenko, S.; Yook, Y.; Zhang, Z. P.; Zhilich, V.; Zhulanov, V.; Zupanc, A.
- Issue Date
- 8-4월-2014
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW D, v.89, no.7
- Indexed
- SCOPUS
- Journal Title
- PHYSICAL REVIEW D
- Volume
- 89
- Number
- 7
- ISSN
- 2470-0010
- Abstract
- We present a study of the branching fraction of the decay B-0 -> rho(0)rho(0) and the fraction of longitudinally polarized rho(0) mesons in this decay. The results are obtained from the final data sample containing 772 x 10(6) B (B) over bar pairs collected at the gamma(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We find 166 +/- 59 B-0 -> rho(0)rho(0) events (including systematic uncertainties), corresponding to a branching fraction of B(B-0 -> rho(0)rho(0)) = (1.02 +/- 0.30(stat) +/- 0.15(syst)) x 10(-6) with a significance of 3.4 standard deviations and a longitudinal polarization fraction f(L) = 0.21(-0.22)(+0.18()stat) +/- 0.15(syst). We use the longitudinal polarization fraction to determine the Cabibbo-Kobayashi-Maskawa matrix angle phi(2) = (84.9 +/- 13.5)degrees through an isospin analysis in the B ->rho rho system. We furthermore find 125 +/- 41 B-0 -> f(0)rho(0) events, corresponding to B(B-0 -> f(0)rho(0)) x B(f(0) -> pi(+)pi(-)) = (0.78 +/- 0.22(stat) +/- 0.11(syst)) x 10(-6), with a significance of 3.1 standard deviations. We find no other significant contribution with the same final state, and set upper limits at 90% confidence level on the (product) branching fractions, B(B-0 -> pi(+)pi(-)pi(+)pi(-)) < 11.2 x 10(-6), B(B-0 -> rho(0)pi(+)pi(-)) < 12.0 x 10(-6), B(B-0 -> f(0)pi(+)pi(-)) x B(f(0) -> pi(+)pi(-)) < 3.0 x 10(-6) and B(B-0 -> f(0)f(0)) x B(f(0) -> pi(+)pi(-))(2) < 0.2 x 10(-6).
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