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.

Published in:
Physical Review D - Particles, Fields, Gravitation and Cosmology, 76, 1, null
Other identifiers:
Scopus: 2-s2.0-34447304051
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 Record created 2010-11-05, last modified 2018-01-28

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