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

(Belle Collaboration)

doi:10.1103/PhysRevD.93.032010

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

(Belle Collaboration)

Max Planck Institute for Physics (Werner Heisenberg Institute)
Technische Universität München
University of Tabuk
The Graduate University for Advanced Studies
High Energy Accelerator Research Organization, Tsukuba
The University of Tokyo
King Abdulaziz University
RAS - Budker Institute of Nuclear Physics
Novosibirsk State University
Pacific Northwest National Laboratory
Middle East Technical University
Moscow Institute of Physics and Technology
Tata Institute of Fundamental Research
King Abdulaziz City for Science and Technology
The University of Sydney
University of Melbourne
Indian Institute of Technology Madras
Indian Institute of Technology Guwahati
Jožef Stefan Institute
H. Niewodniczanski Institute of Nuclear Physics
University of Maribor
University of Hawai'i at Mānoa
Charles University
National Taiwan University
National Central University
Hanyang University
Moscow Engineering Physics Institute
Gyeongsang National University
Sungkyunkwan University
Wayne State University
Indian Institute of Technology Bhubaneswar
University of Bonn
German Electron Synchrotron

Research output: Contribution to journal › Article › peer-review

36 Scopus citations

Abstract

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.

Original language	English
Article number	032010
Journal	Physical Review D
Volume	93
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevD.93.032010
State	Published - 26 Feb 2016

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10.1103/PhysRevD.93.032010

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@article{dcc3096842464740815476591f8da57a,

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

abstract = "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.",

author = "\{(Belle Collaboration)\} and P. Vanhoefer and J. Dalseno and C. Kiesling and A. Abdesselam and I. Adachi and H. Aihara and \{Al Said\}, S. and K. Arinstein and Asner, \{D. M.\} and H. Atmacan and T. Aushev and T. Aziz and V. Babu and I. Badhrees and Bakich, \{A. M.\} and V. Bansal and E. Barberio and P. Behera and B. Bhuyan and J. Biswal and A. Bobrov and A. Bozek and M. Bra{\v c}ko and Browder, \{T. E.\} and D. {\v C}ervenkov and P. Chang and V. Chekelian and A. Chen and Cheon, \{B. G.\} and K. Chilikin and R. Chistov and V. Chobanova and Choi, \{S. K.\} and Y. Choi and D. Cinabro and M. Danilov and N. Dash and J. Dingfelder and Z. Dole{\v Z}al and Z. Dr{\'a}sal and D. Dutta and S. Eidelman and H. Farhat and Fast, \{J. E.\} and T. Ferber and Fulsom, \{B. G.\} and V. Gaur and Kookhyun Kang and Kim, \{H. J.\} and Kim, \{M. J.\}",

note = "Publisher Copyright: {\textcopyright} 2016 American Physical Society.",

year = "2016",

month = feb,

day = "26",

doi = "10.1103/PhysRevD.93.032010",

language = "English",

volume = "93",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "3",

}

TY - JOUR

T1 - Study of B0 → ρ+ ρ- Decays and implications for the CKM angle φ 2

AU - (Belle Collaboration)

AU - Vanhoefer, P.

AU - Dalseno, J.

AU - Kiesling, C.

AU - Abdesselam, A.

AU - Adachi, I.

AU - Aihara, H.

AU - Al Said, S.

AU - Arinstein, K.

AU - Asner, D. M.

AU - Atmacan, H.

AU - Aushev, T.

AU - Aziz, T.

AU - Babu, V.

AU - Badhrees, I.

AU - Bakich, A. M.

AU - Bansal, V.

AU - Barberio, E.

AU - Behera, P.

AU - Bhuyan, B.

AU - Biswal, J.

AU - Bobrov, A.

AU - Bozek, A.

AU - Bračko, M.

AU - Browder, T. E.

AU - Červenkov, D.

AU - Chang, P.

AU - Chekelian, V.

AU - Chen, A.

AU - Cheon, B. G.

AU - Chilikin, K.

AU - Chistov, R.

AU - Chobanova, V.

AU - Choi, S. K.

AU - Choi, Y.

AU - Cinabro, D.

AU - Danilov, M.

AU - Dash, N.

AU - Dingfelder, J.

AU - DoleŽal, Z.

AU - Drásal, Z.

AU - Dutta, D.

AU - Eidelman, S.

AU - Farhat, H.

AU - Fast, J. E.

AU - Ferber, T.

AU - Fulsom, B. G.

AU - Gaur, V.

AU - Kang, Kookhyun

AU - Kim, H. J.

AU - Kim, M. J.

PY - 2016/2/26

Y1 - 2016/2/26

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/84960898790

U2 - 10.1103/PhysRevD.93.032010

DO - 10.1103/PhysRevD.93.032010

M3 - Article

AN - SCOPUS:84960898790

SN - 2470-0010

VL - 93

JO - Physical Review D

JF - Physical Review D

IS - 3

M1 - 032010

ER -

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

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