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| 題名: | Study of B0 → ρ+ ρ- Decays and implications for the CKM angle φ 2 |
| 作者: | 陳鎰鋒;Vanhoefer, P.;Dalseno, J.;Said, S. Al;Asner, D. M.;Atmacan, H.;Aushev, T.;Babu, V.;Bansal, V.;Barberio, E.;Behera, P.;Bhuyan, B.;Biswal, J.;Bobrov, A.;Browder, T. E.;Chang, P.;Chen, A.;Chobanova, V.;Dash, N.;Dingfelder, J.;Doležal, Z.;Drásal, Z.;Dutta, D.;Eidelman, S.;Fast, J. E.;Ferber, T.;Gaur, V.;Garmash, A.;Gillard, R.;Goldenzweig, P.;Golob, B.;Hamer, P.;Hayasaka, K.;Hayashii, H.;He, X. H.;Hou, W.-S.;Iijima, T.;Inami, K.;Ishikawa, A.;Itoh, R.;Iwasaki, Y.;Jacobs, W. W.;Joffe, D.;Joo, K. K.;Kang, K. H.;Kato, E.;Katrenko, P.;Kawasaki, T.;Kim, D. Y.;Kim, H. J.;Kim, J. B.;Kim, J. H.;Kim, S. H.;Kim, Y. J.;Korpar, S.;Križan, P.;Kuzmin, A.;Kwon, Y.-J.;Lee, I. S.;Li, L.;Liventsev, D.;Lukin, P.;Masuda, M.;Matvienko, D.;Miyabayashi, K.;Miyata, H.;Mohanty, G. B.;Mohanty, S.;Nakano, E.;Ogawa, S.;Okuno, S.;Pakhlova, G.;Pedlar, T. K.;Pulvermacher, C.;Ribežl, E.;Ritter, M.;Sakai, Y.;Santelj, L.;Sanuki, T.;Schneider, O.;Schwanda, C.;Senyo, K.;Sevior, M. E.;Shebalin, V.;Shen, C. P.;Simon, F.;Sohn, Y.-S.;Sokolov, A.;Starič, M.;Sumihama, M.;Tamponi, U.;Uchida, M.;Uglov, T.;Hulse, C. Van;Wang, C. H.;Watanabe, Y.;Yamamoto, H.;Yashchenko, S.;Yook, Y.;Zhilich, V.;Zupanc, A. |
| 貢獻者: | 理學院物理學系 |
| 關鍵詞: | ddc:530;info:eu-repo/classification/ddc/530;Physics |
| 日期: | 2016-02-26 |
| 上傳時間: | 2026-04-23 14:29:13 (UTC+8) |
| 出版者: | American Physical Society;American Physical Society (APS) |
| 摘要: | 摘要： We present a measurement of the branching fraction and the longitudinal polarization fraction of B-0 -> 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 x 10(6) B (B) over bar pairs, at the Upsilon(4S) resonance, collected at the asymmetric-energy e(+)e(-) collider KEKB. We obtain B(B-0 -> rho(+)rho(-)) = (28.3 +/- 1.5(stat) +/- 1.5(syst)) x 10(-6), f(L) = 0.988 +/- 0.012(stat) +/- 0.023(syst), A(CP) = 0.00 +/- 0.10(stat) +/- 0.06(syst), S-CP = -0.13 +/- 0.15(stat) +/- 0.05(syst). We perform an isospin analysis to constrain the Cabibbo-Kobayashi-Maskawa angle phi(2) and obtain two solutions with phi(2) = (93.7 +/- 10.6)degrees, being most compatible with other Standard-Model based fits to the data.
出版者： American Physical Society (APS)
出版日期： 2016-02-26
出處： Physical Review D, 2016-02, Vol.93 (3)
識別號： ISSN: 2470-0010
識別號： DOI: 10.1103/physrevd.93.032010 |
| 顯示於類別: | [物理學系] 期刊論文
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