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

Journal Article · Wed Oct 01 04:00:00 EDT 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.78.071102· OSTI ID:21254236

Aubert, B; Bona, M; Karyotakis, Y; Lees, J P; Poireau, V; Prencipe, E; Prudent, X; Tisserand, V ^[1]; Tico, J Garra; 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; Cahn, R 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. INFN Sezione di Bari, I-70126 Bari (Italy)
4. University of Bergen, Institute of Physics, N-5007 Bergen (Norway)
5. Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA, and University of California, Berkeley, California 94720 (United States)

We measure the time-dependent CP asymmetry in B{sup 0}{yields}K{sub S}{sup 0}{pi}{sup 0}{gamma} decays for two regions of K{sub S}{sup 0}-{pi}{sup 0} invariant mass, m(K{sub S}{sup 0}{pi}{sup 0}), using the final BABAR data set of 467x10{sup 6} BB pairs collected at the PEP-II e{sup +}e{sup -} collider at SLAC. We find 339{+-}24 B{sup 0}{yields}K*{sup 0}{gamma} candidates and measure S{sub K*{gamma}}=-0.03{+-}0.29{+-}0.03 and C{sub K*{gamma}}=-0.14{+-}0.16{+-}0.03. In the range 1.1<m(K{sub S}{sup 0}{pi}{sup 0})<1.8 GeV/c{sup 2} we find 133{+-}20 B{sup 0}{yields}K{sub S}{sup 0}{pi}{sup 0}{gamma} candidates and measure S{sub K{sub S}{sup 0}}{sub {pi}{sup 0}}{sub {gamma}}=-0.78{+-}0.59{+-}0.09 and C{sub K{sub S}{sup 0}}{sub {pi}{sup 0}}{sub {gamma}}=-0.36{+-}0.33{+-}0.04. The uncertainties are statistical and systematic, respectively.

• OSTI ID: 21254236
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 7 Vol. 78; ISSN PRVDAQ; 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 COLLISIONS
ELECTRONS
GAMMA RADIATION
GEV RANGE
KAONS NEUTRAL
MASS
PEP STORAGE RINGS
PIONS NEUTRAL
POSITRONS
RADIATIVE DECAY
STANFORD LINEAR ACCELERATOR CENTER
TIME DEPENDENCE