Measurement of the CP-violating asymmetries in B{sup 0}{yields}K{sub s}{sup 0}{pi}{sup 0} and of the branching fraction B{sup 0}{yields}K{sup 0}{pi}{sup 0}

Journal Article · Tue Jan 01 04:00:00 EST 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.77.012003· OSTI ID:21035674

Aubert, B; Bona, M; Boutigny, D; Karyotakis, Y; Lees, J P; Poireau, V; Prudent, X; Tisserand, V; Zghiche, A ^[1]; Garra Tico, J; Grauges, E ^[2]; Lopez, L; Palano, A; Pappagallo, M ^[3]; Eigen, G; Stugu, B; Sun, L ^[4]; Abrams, G S; Battaglia, M; Brown, D N ^[5]

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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. University of Bergen, Institute of Physics, N-5007 Bergen (Norway)
5. Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)

We present a measurement of the time-dependent CP-violating asymmetries in B{sup 0}{yields}K{sub S}{sup 0}{pi}{sup 0} decays based on 383x10{sup 6} {upsilon}(4S){yields}BB events collected by the BABAR experiment at the PEP-II asymmetric-energy B Factory at the Stanford Linear Accelerator Center. We measure the direct CP-violating asymmetry C{sub K{sub S}{sup 0}}{sub {pi}{sup 0}}=0.24{+-}0.15{+-}0.03 and the CP-violating asymmetry in the interference between mixing and decay S{sub K{sub S}{sup 0}}{sub {pi}{sup 0}}=0.40{+-}0.23{+-}0.03, where the first errors are statistical and the second are systematic. On the same sample, we measure the decay branching fraction, obtaining B(B{sup 0}{yields}K{sup 0}{pi}{sup 0})=(10.3{+-}0.7{+-}0.6)x10{sup -6}.

• OSTI ID: 21035674
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 1 Vol. 77; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
BRANCHING RATIO
CP INVARIANCE
HADRONIC PARTICLE DECAY
KAONS NEUTRAL SHORT-LIVED
MESON FACTORIES
MULTIPARTICLE SPECTROMETERS
PARTICLE IDENTIFICATION
PEP STORAGE RINGS
PIONS NEUTRAL
TIME DEPENDENCE
UPSILON-10580 MESONS