Measurement of the B{sup {+-}}{yields}{rho}{sup {+-}}{pi}{sup 0} branching fraction and direct CP asymmetry

Journal Article · Tue May 01 00:00:00 EDT 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.75.091103· OSTI ID:21020455

Aubert, B; Bona, M; Boutigny, D; Couderc, F; Karyotakis, Y; Lees, J P; Poireau, V; Tisserand, V; Zghiche, A ^[1]; Grauges, E ^[2]; Palano, A ^[3]; Chen, J C; Qi, N D; Rong, G; Wang, P; Zhu, Y S ^[4]; Eigen, G; Ofte, I; Stugu, B ^[5]; Abrams, G S ^[6]

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1. Laboratoire de Physique des Particules, IN2P3/CNRS et Universite de Savoie, F-74941 Annecy-Le-Vieux (France)
2. Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona (Spain)
3. Universita di Bari, Dipartimento di Fisica and INFN, I-70126 Bari (Italy)
4. Institute of High Energy Physics, Beijing 100039 (China)
5. University of Bergen, Institute of Physics, N-5007 Bergen (Norway)
6. Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)

We present improved measurements of the branching fraction and CP asymmetry for the process B{sup {+-}}{yields}{rho}{sup {+-}}{pi}{sup 0}. The data sample corresponding to 211 fb{sup -1} comprises 232x10{sup 6} {upsilon}(4S){yields}BB decays collected with the BABAR detector at the PEP-II asymmetric B Factory at SLAC. The yield and CP asymmetry are measured using an extended maximum likelihood fitting method. The branching fraction and CP asymmetry are found to be B(B{sup {+-}}{yields}{rho}{sup {+-}}{pi}{sup 0})=[10.2{+-}1.4(stat){+-}0.9(syst)]x10{sup -6} and A{sub CP}(B{sup {+-}}{yields}{rho}{sup {+-}}{pi}{sup 0})=-0.01{+-}0.13(stat){+-}0.02(syst)

• OSTI ID: 21020455
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 75; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
B MINUS MESONS
B PLUS MESONS
BRANCHING RATIO
CP INVARIANCE
ELECTRON-POSITRON INTERACTIONS
HADRONIC PARTICLE DECAY
MAXIMUM-LIKELIHOOD FIT
MULTIPARTICLE SPECTROMETERS
PARTICLE IDENTIFICATION
PEP STORAGE RINGS
PIONS NEUTRAL
RHO-770 MESONS
STANDARD MODEL
UPSILON-10580 MESONS