Measurements of the Branching Fraction and CP-Violation Asymmetries in B0->f0(980)Ks

Technical Report · Wed Jun 16 04:00:00 EDT 2004

DOI:https://doi.org/10.2172/827004· OSTI ID:827004

Aubert, B ^[1]

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1. SLAC

The authors present measurements of the branching fraction and CP-violating asymmetries in the decay B{sup 0} {yields} f{sub 0}(980)K{sub S}{sup 0}. The results are obtained from a data sample of 123 x 10{sup 6} {Upsilon}(4S) {yields} B{bar B} decays. From a time-dependent maximum likelihood fit they measure the branching fraction {Beta}(B{sup 0} {yields} f{sub 0}(980)({yields}{Pi}{sup +}{pi}{sup 0})K{sup 0}) = (6.0 {+-} 0.9 {+-} 0.6 {+-} 1.2) x 10{sup -6}, the mixing-induced CP violation parameter S = 1.62{sub -0.51}{sup +0.56} {+-} 0.09 {+-} 0.04 and the direct CP violation parameter C = 0.27 {+-} 0.36 {+-} 0.10 {+-} 0.07, where the first errors are statistical, the second systematic and the third due to model uncertainties. They measure the f{sub 0}(980) mass and width to be m{sub f{sub 0(980)}} = (980.6 {+-} 4.1 {+-} 0.5 {+-} 4.0) MeV/c{sup 2} and {Lambda}{sub f{sub 0(980)}} = (43{sub -9}{sup +12} {+-} 3 {+-} 9) MeV/c{sup 2}, respectively.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (US)
• Sponsoring Organization: USDOE Office of Science (US)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 827004
• Report Number(s): SLAC-PUB-10498
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
B NEUTRAL MESONS
BRANCHING RATIO
CP INVARIANCE
DATA
F0-980 MESONS
KAONS NEUTRAL SHORT-LIVED
MAXIMUM-LIKELIHOOD FIT
PARTICLE DECAY
PIONS PLUS