BABAR Publications

Detailed Index as of April 19, 2024 03:46

CONF-06/027 Evidence for the B0 -> rho0 rho0 Decay and Implications for the CKM Angle alpha

Doc Type

Conference Submissions

Record Created

July 6, 2006

SLAC-PUB

SLAC-PUB-11961 No citations

Preprint #

hep-ex/0607097

Abstract

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We search for the decays B0->rho0rho0, B0->rho0f0, and B0->f0f0
in a sample of about 348 million Upsilon(4S)->BBbar decays 
collected with the BABAR detector at the PEP-II asymmetric-energy
e+e- collider at SLAC. We find evidence for B0->rho0rho0 with 
3.0 sigma significance and measure the branching fraction
B = (1.16 +0.37-0.36 +-0.27) 10^{-6} and longitudinal polarization 
fraction f_L = 0.86 +0.11-0.13 +-0.05. As a consequence, 
the uncertainty on the CKM unitarity angle alpha due to penguin 
contributions in B->rhorho decays is estimated to be 18 degrees
at 1 sigma level. We also set upper limits on the B0->rho0f0 and 
B0->f0f0 decay rates. All results are preliminary.

Revisions and Files

1 revised July 6, 2006

File Date Thumbnails	File Name	File Type	File Format	File Size (Kb)	Comments
29-JUL-2006	abstract.txt	Abstract	txt	0.67
29-JUL-2006	babar-conf-06-027.pdf	Paper (journal paper or conference submission by BABAR Collaboration)	pdf	164.42
29-JUL-2006	babar-conf-06-027.ps.gz	Paper (journal paper or conference submission by BABAR Collaboration)	ps.gz	161.37
29-JUL-2006	fig01.eps	Figure or plot	eps	17.32	mES projection
29-JUL-2006	fig02.eps	Figure or plot	eps	14.68	dE projection
29-JUL-2006	fig03.eps	Figure or plot	eps	11.39	delta(alpha) chi^2 scan

Submitted To	2006 International Conference on High Energy Physics (ICHEP'06)
Date Submitted	July 28, 2006