Measurement of the Branching Fraction, Polarization, and CP Asymmetry for B{sup 0}{yields}{rho}{sup +}{rho}{sup -} Decays, and Determination of the Cabibbo-Kobayashi-Maskawa Phase {phi}{sub 2}

Journal Article · Fri May 05 04:00:00 EDT 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.96.171801· OSTI ID:20775224

Somov, A; Schwartz, A J; Bahinipati, S; Drutskoy, A; Kinoshita, K ^[1]; Abe, K; Adachi, I; Dragic, J; Gershon, T; Hara, K; Hazumi, M; Ishikawa, A; Itoh, R; Iwasaki, Y; Katayama, N; Kichimi, H; Limosani, A; Nakao, M; Nishida, S; Ozaki, H ^[2]

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1. University of Cincinnati, Cincinnati, Ohio 45221 (United States)
2. High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)

We have measured the branching fraction B, longitudinal polarization fraction f{sub L}, and CP asymmetry coefficients A and S for B{sup 0}{yields}{rho}{sup +}{rho}{sup -} decays with the Belle detector at the KEKB e{sup +}e{sup -} collider using 253 fb{sup -1} of data. We obtain B=[22.8{+-}3.8(stat){sub -2.6}{sup +2.3}(syst)]x10{sup -6}, f{sub L}=0.941{sub -0.040}{sup +0.034}(stat){+-}0.030(syst), A=0.00{+-}0.30(stat){+-}0.09(syst), and S=0.08{+-}0.41(stat){+-}0.09(syst). These values are used to constrain the Cabibbo-Kobayashi-Maskawa phase {phi}{sub 2}; the solution consistent with the standard model is {phi}{sub 2}=(88{+-}17) deg. or 59 deg. <{phi}{sub 2}<115 deg. at 90% C.L.

• OSTI ID: 20775224
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 17 Vol. 96; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
ASYMMETRY COEFFICIENTS
B NEUTRAL MESONS
BRANCHING RATIO
CP INVARIANCE
HADRONIC PARTICLE DECAY
KOBAYASHI-MASKAWA MATRIX
MATHEMATICAL SOLUTIONS
POLARIZATION
RHO-770 MESONS
STANDARD MODEL