Limit on the B0->rho0rho0 Branching Fraction and Implications for the CKM Angle alpha

Preprint

23 December 2004

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.hep-ex/0412067

Abstract

We search for the decay B0 -> rho0 rho0 in a data sample of about 227 million Upsilon(4S)-> BBbar decays collected with the BABAR detector at the PEP-II asymmetric-energy e+e- collider at SLAC. We find no significant signal and set an upper limit of 1.1*10^-6 at 90% CL on the branching fraction. As a result, the uncertainty due to penguin contributions on the CKM unitarity angle alpha measured in B -> rho rho decays is 11 degrees at 68% CL.

Keywords

RHO0RHO0 BRANCHING
BRANCHING FRACTION
ANGLE ALPHA
UNCERTAINTY
DATA SAMPLE
CKM ANGLE
DECAYS

All Related Versions

Version 1, 2004-12-23, ArXiv
Published version: Physical Review Letters, 94 (13), 131801.

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