Measurements of the CKM Matrix Element |V{sub ub}| with BABAR

Technical Report · Mon Oct 27 23:00:00 EST 2003

DOI:https://doi.org/10.2172/826473· OSTI ID:826473

Wilden, L ^[1]

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1. SLAC

A preliminary BABAR measurement of the inclusive partial branching fraction b {yields} ue{nu} is presented. The authors find {Delta}{Beta}(b {yields} ue{nu}, 2.3...2.6 GeV) = (0.152 {+-} 0.014{sub stat.} {+-} 0.014{sub syst.}) x 10{sup -3}. In addition, a preliminary measurement of the branching fraction B {yields} {rho}e{nu} is presented and the CKM matrix element |V{sub ub}| is determined from this measurement. The authors find {Beta}(B{sup 0} {yields} {rho}{sup -} e{sup +} {nu}) = (3.39 {+-} 0.44{sub stat.} {+-} 0.52{sub syst.} {+-} 0.60 {sub theo}.) x 10{sup -4}, and |V{sub ub}| = (3.69 {+-} 0.23{sub stat.} {+-} 0.27{sub syst.} {sub -0.59 theo.}{sup +0.40}) x 10{sup -3}.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (US)
• Sponsoring Organization: USDOE Office of Science (US)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 826473
• Report Number(s): SLAC-PUB-10227
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B NEUTRAL MESONS
BRANCHING RATIO
DATA
INCLUSIVE INTERACTIONS
MATRIX ELEMENTS
PARTICLE DECAY