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Improved measurement ofCP-violating parameters inB→ρ+ρ−decays
- Source :
- Physical Review D. 76
- Publication Year :
- 2007
- Publisher :
- American Physical Society (APS), 2007.
-
Abstract
- We present a measurement of the CP-violating asymmetry in B0→ρ+ρ- decays using 535×106 BB 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
Details
- ISSN :
- 15502368 and 15507998
- Volume :
- 76
- Database :
- OpenAIRE
- Journal :
- Physical Review D
- Accession number :
- edsair.doi...........9fbc6bd40a116d3a92ff43b40370cc65