Time-dependent amplitude analysis of B{sup 0}{yields}K{sub S}{sup 0}{pi}{sup +}{pi}{sup -}

Journal Article · Tue Dec 01 00:00:00 EST 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.80.112001· OSTI ID:21313439

Aubert, B; Karyotakis, Y; Lees, J P; Poireau, V; Prencipe, E; Prudent, X; Tisserand, V ^[1]; Tico, J Garra; Grauges, E ^[2]; Martinelli, M; Palano, A; Pappagallo, M ^[3]; Eigen, G; Stugu, B; Sun, L ^[4]; Battaglia, M; Brown, D N; Kerth, L T; Kolomensky, Yu G; Lynch, G ^[5]

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1. Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Universite de Savoie, CNRS/IN2P3, 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 and University of California, Berkeley, California 94720 (United States)

We perform a time-dependent amplitude analysis of B{sup 0}{yields}K{sub S}{sup 0}{pi}{sup +}{pi}{sup -} decays to extract the CP violation parameters of f{sub 0}(980)K{sub S}{sup 0} and {rho}{sup 0}(770)K{sub S}{sup 0} and the direct CP asymmetry of K*{sup +}(892){pi}{sup -}. The results are obtained from a data sample of (383{+-}3)x10{sup 6} BB decays, collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. We find two solutions, with an equivalent goodness-of-fit. Including systematic and Dalitz plot model uncertainties, the combined confidence interval for values of the CP parameter {beta}{sub eff} in B{sup 0} decays to f{sub 0}(980)K{sub S}{sup 0} is 18 deg. <{beta}{sub eff}<76 deg. at 95% confidence level (C.L). CP conservation in B{sup 0} decays to f{sub 0}(980)K{sub S}{sup 0} is excluded at 3.5 standard deviations including systematic uncertainties. For B{sup 0} decays to {rho}{sup 0}(770)K{sub S}{sup 0}, the combined confidence interval is -9 deg. <{beta}{sub eff}<57 deg. at 95% C.L. In decays to K*{sup +}(892){pi}{sup -} we measure the direct CP asymmetry to be A{sub CP}=-0.20{+-}0.10{+-}0.01{+-}0.02. The measured phase difference (including B{sup 0}B{sup 0} mixing) between decay amplitudes of B{sup 0}{yields}K*{sup +}(892){pi}{sup -} and B{sup 0}{yields}K*{sup -}(892){pi}{sup +}, excludes the interval -137 deg. <{delta}{phi}(K*{sup +}(892){pi}{sup -})<-5 deg. at 95% C.L.

• OSTI ID: 21313439
• Journal Information: Physical Review. D, Particles Fields, Vol. 80, Issue 11; Other Information: DOI: 10.1103/PhysRevD.80.112001; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); 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
DALITZ PLOT
DECAY AMPLITUDES
F0-980 MESONS
KAONS MINUS
KAONS NEUTRAL SHORT-LIVED
MATHEMATICAL SOLUTIONS
MESON FACTORIES
MIXING
PARTICLE DECAY
PIONS MINUS
PIONS PLUS
STANFORD LINEAR ACCELERATOR CENTER
TIME DEPENDENCE