Study of the Decay B0 (anti-B0) ->rho+rho- and Constraints on the CKM Angle Alpha

Technical Report · Fri Apr 23 00:00:00 EDT 2004

DOI:https://doi.org/10.2172/826858· OSTI ID:826858

Aubert, B

Using a data sample of 89 million {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric B Factory at SLAC, the authors measure the B{sup 0}({bar B}{sup 0}) {yields} {rho}{sup +}{rho}{sup -} branching fraction as (30 {+-} 4(stat) {+-} 5(syst)) x 10{sup -6} and a longitudinal polarization fraction of f{sub L} = 0.99 {+-} 0.03(stat){sub -0.03}{sup +0.04}(syst). They measure the time-dependent-asymmetry parameters of the longitudinally polarized component of this decay as C{sub L} = -0.17 {+-} 0.27(stat) {+-} 0.14(syst) and S{sub L} = -0.42(stat) {+-} 0.14(syst). They present constraints on the CKM angle {alpha}.

• Research Organization: SLAC National Accelerator Lab., Menlo Park, CA (United States)
• Sponsoring Organization: USDOE Office of Science (US)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 826858
• Report Number(s): SLAC-PUB-10399; TRN: US0404197
• Resource Relation: Other Information: PBD: 23 Apr 2004
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
PARTICLE DECAY
POLARIZATION
B NEUTRAL MESONS
ANTI-B NEUTRAL MESONS
VECTOR MESONS
BRANCHING RATIO
DATA
ASYMMETRY