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research article
Improved measurement of CP-violating parameters in B→ρ+ρ- decays
We present a measurement of the CP-violating asymmetry in B0→ρ+ρ- decays using 535×106 BB̄ pairs collected with the Belle detector at the KEKB e+e- collider. We measure CP-violating coefficients A=0.16±0.21(stat)±0.08(syst) and S=0.19±0. 30(stat)±0.08(syst). These values are used to determine the unitarity triangle angle 2 using an isospin analysis; the solution consistent with the standard model lies in the range 54°< 2<113° at the 90% confidence level. © 2007 The American Physical Society.
Type
research article
Web of Science ID
WOS:000248544300004
Scopus ID
2-s2.0-34447304051
Author(s)
Somov, A.
•
Schwartz, A.J.
•
Adachi, I.
•
Aihara, H.
•
Anipko, D.
•
Aulchenko, V.
•
Aushev, T.
•
Bakich, A.M.
•
Bedny, I.
•
Bitenc, U.
Date Issued
2007
Publisher
Published in
Volume
76
Issue
1
Article Number
011104
Peer reviewed
REVIEWED
Written at
EPFL
EPFL units
Available on Infoscience
November 5, 2010
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