Observation of B Meson Decays to eta pi and eta K

Technical Report · Wed Mar 26 04:00:00 EST 2003

DOI:https://doi.org/10.2172/812976· OSTI ID:812976

Smith, James G ^[1]

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1. SLAC

The authors present preliminary measurements of the B meson decays B{sup +} {yields} {eta}{pi}{sup +}, B{sup +} {yields} {eta}K{sup +}, and B{sup 0} {yields} {eta}K{sup 0}. The data were recorded with the BABAR detector at PEP II and correspond to 88.9 x 10{sup 6} B{bar B} pairs produced in e{sup +}e{sup -} annihilation through the {Upsilon}(4S) resonance. They find the branching fractions {Beta}(B{sup +} {yields} {eta}{pi}{sup +}) = (4.2{sub -0.9}{sup +1.0} {+-} 0.3) x 10{sup -6} and {Beta}(B{sup +} {yields} {eta}K{sup +}) = (2.8{sub -0.7}{sup +0.8} {+-} 0.2) x 10{sup -6}. They set a 90% CL upper limit of {Beta}(B{sup 0} {yields} {eta}K{sup 0}) < 4.6 x 10{sup -6}. The time-integrated charge asymmetries are {Alpha}{sub ch}(B{sup +} {yields} {eta}{pi}{sup +}) = -0.51{sub -0.18}{sup +0.20} {+-} 0.01 and {Alpha}{sub ch}(B{sup +} {yields} {eta}K{sup +}) = -0.32{sub -0.18}{sup +0.22} {+-} 0.01.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (US)
• Sponsoring Organization: USDOE Office of Science (US)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 812976
• Report Number(s): SLAC-PUB-9692
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANNIHILATION
B MESONS
RESONANCE