Measurement of the time-dependent CP-violating asymmetry in B{sup 0}{yields}K{sub S}{sup 0}{pi}{sup 0}{gamma} decays

Journal Article · Thu Sep 01 00:00:00 EDT 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.72.051103· OSTI ID:20711395

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

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1. Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux (France)
2. IFAE, Universitat Autonoma de Barcelona, E-08193 Bellaterra, 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, Inst. of Physics, N-5007 Bergen (Norway); and others

We present a measurement of the time-dependent CP-violating asymmetry in B{sup 0}{yields}K*{sup 0}{gamma} decays with K*{sup 0}{yields}K{sub S}{sup 0}{pi}{sup 0} based on 232x10{sup 6} {upsilon}(4S){yields}BB decays collected with the BABAR detector at the PEP-II asymmetric-energy e{sup +}e{sup -} collider at SLAC. In a sample containing 157{+-}16 signal decays, we measure S{sub K*{sup 0}}{sub {gamma}}=-0.21{+-}0.40{+-}0.05 and C{sub K*{sup 0}}{sub {gamma}}=-0.40{+-}0.23{+-}0.03, where the first error is statistical and the second systematic. We also explore B{sup 0}{yields}K{sub S}{sup 0}{pi}{sup 0}{gamma} decays with 1.1<m{sub K{sub S}{sup 0}}{sub {pi}{sup 0}}<1.8 GeV/c{sup 2} and find 59{+-}13 signal events with S{sub K{sub S}{sup 0}}{sub {pi}{sup 0}}{sub {gamma}}=0.9{+-}1.0{+-}0.2 and C{sub K{sub S}{sup 0}}{sub {pi}{sup 0}}{sub {gamma}}=-1.0{+-}0.5{+-}0.2.

• OSTI ID: 20711395
• Journal Information: Physical Review. D, Particles Fields, Vol. 72, Issue 5; Other Information: DOI: 10.1103/PhysRevD.72.051103; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA). BABAR Collaboration; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
B NEUTRAL MESONS
CP INVARIANCE
ELECTRON-POSITRON INTERACTIONS
ERRORS
GEV RANGE
HADRONIC PARTICLE DECAY
K*-892 MESONS
KAONS NEUTRAL SHORT-LIVED
MULTIPARTICLE SPECTROMETERS
PARTICLE IDENTIFICATION
PEP STORAGE RINGS
PHOTONS
PIONS NEUTRAL
RESONANCE PARTICLES
TIME DEPENDENCE
UPSILON-10580 MESONS