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CONF-05/016 Measurements of the Branching Fraction and Time-Dependent CP-Asymmetries of B0 -> J/psi pi0 Decays

Doc Type

Conference Submissions

Record Created

July 5, 2005

SLAC-PUB

SLAC-PUB-11362 No citations

Preprint #

hep-ex/0507074

Abstract

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We present measurements of the branching fraction and time-dependent CP asymmetries
in B0 -> JPsi pi0 decays based on (231.8 +/- 2.6) x 10**6 Y(4S) -> BBbar decays 
collected with the BaBar detector at the PEP-II asymmetric-energy B factory at SLAC 
during the years 1999-2004. 

We obtain a branching fraction 
          B(B0 -> JPsi pi0) = (1.94 +/- 0.22 (stat.) +/- 0.17 (syst.)) x 10**-5. 

We also measure the CP asymmetry parameters 
          C = -0.21 +/- 0.26 (stat.) +/- 0.09 (syst.) 
    and   S = -0.68 +/- 0.30 (stat.) +/- 0.04 (syst.). 

All results presented in this paper are preliminary.

Revisions and Files

1 revised July 5, 2005

File Date Thumbnails	File Name	File Type	File Format	File Size (Kb)	Comments
27-JUL-2005	abstract.txt	Abstract	txt	0.59	Abstract
27-JUL-2005	ass.eps	Figure or plot	eps	10.11	(Figure 2). Fisher projection plot.
28-JUL-2005	conf eps2005.pdf	Paper (journal paper or conference submission by BABAR Collaboration)	pdf	190.56	pdf version
27-JUL-2005	conf eps2005.ps	Paper (journal paper or conference submission by BABAR Collaboration)	ps	364.07	Conference submission
27-JUL-2005	gluon penguin jpsipio0.eps	Figure or plot	eps	8.05	(Figure 1 - right). Feynman diagram of the gluonic penguin amplitude contributing to the B0 -> J/Psi pi0 decay.
27-JUL-2005	test2.eps	Figure or plot	eps	10.52	(Figure 2). deltaE projection plot.
27-JUL-2005	test3.eps	Figure or plot	eps	11.79	(Figure 2). mES projection plot.
27-JUL-2005	test asym.eps	Figure or plot	eps	15.06	(Figure 3). delta t and time-dependent CP asymmetry plots.
27-JUL-2005	wcsjpsipio.eps	Figure or plot	eps	6.51	(Figure 1 - left). Feynman diagram of the color suppressed tree amplitude contributing to the B0 -> J/Psi pi0 decay.

Submitted To	2005 International Europhysics Conference on High Energy Physics
Date Submitted	July 18, 2005