Measurement of the CP Asymmetry and Branching Fraction of B{sup 0}{yields}{rho}{sup 0}K{sup 0}

Journal Article · Fri Feb 02 04:00:00 EST 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.98.051803· OSTI ID:20955416

Aubert, B; Barate, R; 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]

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1. Laboratoire de Physique des Particules, 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)

We present a measurement of the branching fraction and time-dependent CP asymmetry of B{sup 0}{yields}{rho}{sup 0}K{sup 0}. The results are obtained from a data sample of 227x10{sup 6} {upsilon}(4S){yields}BB decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at Stanford Linear Accelerator Center. From a time-dependent maximum likelihood fit yielding 111{+-}19 signal events, we find B(B{sup 0}{yields}{rho}{sup 0}K{sup 0})=(4.9{+-}0.8{+-}0.9)x10{sup -6}, where the first error is statistical and the second systematic. We report the measurement of the CP parameters S{sub {rho}{sup 0}}{sub K{sub S}{sup 0}}=0.20{+-}0.52{+-}0.24 and C{sub {rho}{sup 0}}{sub K{sub S}{sup 0}}=0.64{+-}0.41{+-}0.20.

• OSTI ID: 20955416
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 5 Vol. 98; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
B NEUTRAL MESONS
BRANCHING RATIO
CP INVARIANCE
ERRORS
KAONS NEUTRAL SHORT-LIVED
MAXIMUM-LIKELIHOOD FIT
PARTICLE DECAY
PARTICLE PRODUCTION
RHO-770 MESONS
SIGNALS
STANFORD LINEAR ACCELERATOR CENTER
TIME DEPENDENCE