Study of B0 → ρ+ ρ- Decays and implications for the CKM angle φ 2

Journal Article (Journal Article)

We present a measurement of the branching fraction and the longitudinal polarization fraction of B0→ρ+ρ- decays, as well as the time-dependent CP violating parameters in decays into longitudinally polarized ρ+ρ- pairs with Belle's final data set of 772×106 BB¯ pairs, at the (4S) resonance, collected at the asymmetric-energy e+e- collider KEKB. We obtain B(B0→ρ+ρ-)=(28.3±1.5(stat)±1.5(syst))×10-6, fL=0.988±0.012(stat)±0.023(syst), ACP=0.00±0.10(stat)±0.06(syst), SCP=-0.13±0.15(stat)±0.05(syst). We perform an isospin analysis to constrain the Cabibbo-Kobayashi-Maskawa angle φ2 and obtain two solutions with φ2=(93.7±10.6)°, being most compatible with other Standard-Model based fits to the data.

Full Text

Duke Authors

Cited Authors

  • Vanhoefer, P; Dalseno, J; Kiesling, C; Abdesselam, A; Adachi, I; Aihara, H; Al Said, S; Arinstein, K; Asner, DM; Atmacan, H; Aushev, T; Aziz, T; Babu, V; Badhrees, I; Bakich, AM; Bansal, V; Barberio, E; Behera, P; Bhuyan, B; Biswal, J; Bobrov, A; Bozek, A; Bračko, M; Browder, TE; Červenkov, D; Chang, P; Chekelian, V; Chen, A; Cheon, BG; Chilikin, K; Chistov, R; Chobanova, V; Choi, SK; Choi, Y; Cinabro, D; Danilov, M; Dash, N; Dingfelder, J; DoleŽal, Z; Drásal, Z; Dutta, D; Eidelman, S; Farhat, H; Fast, JE; Ferber, T; Fulsom, BG; Gaur, V; Gabyshev, N; Garmash, A; Gillard, R; Goh, YM; Goldenzweig, P; Golob, B; Greenwald, D; Haba, J; Hamer, P; Hara, T; Hayasaka, K; Hayashii, H; He, XH; Horiguchi, T; Hou, WS; Iijima, T; Inami, K; Ishikawa, A; Itoh, R; Iwasaki, Y; Jacobs, WW; Jaegle, I; Joffe, D; Joo, KK; Julius, T; Kang, KH; Kato, E; Katrenko, P; Kawasaki, T; Kim, DY; Kim, HJ; Kim, JB; Kim, JH; Kim, KT; Kim, MJ; Kim, SH; Kim, YJ; Kinoshita, K; Ko, BR; Korpar, S; KriŽan, P; Krokovny, P; Kuhr, T; Kumita, T; Kuzmin, A; Kwon, YJ; Lee, IS; Li, L; Li, Y; Li Gioi, L; Libby, J; Liventsev, D; Lukin, P

Published Date

  • February 26, 2016

Published In

Volume / Issue

  • 93 / 3

Electronic International Standard Serial Number (EISSN)

  • 2470-0029

International Standard Serial Number (ISSN)

  • 2470-0010

Digital Object Identifier (DOI)

  • 10.1103/PhysRevD.93.032010

Citation Source

  • Scopus