Measurement of Time-Dependent CP Asymmetries in B{sup 0}{yields}D{sup (*){+-}}D{sup {+-}} Decays

Journal Article · Fri Sep 23 04:00:00 EDT 2005 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.95.131802· OSTI ID:20696496

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 first measurement of CP asymmetries in neutral B decays to D{sup +}D{sup -}, and updated CP asymmetry measurements in decays to D*{sup +}D{sup -} and D*{sup -}D{sup +}. We use fully reconstructed decays collected in a data sample of (232{+-}3)x10{sup 6} {upsilon}(4S){yields}BB events in the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We determine the time-dependent asymmetry parameters to be S{sub D*{sup +}}{sub D{sup -}}=-0.54{+-}0.35{+-}0.07, C{sub D*{sup +}}{sub D{sup -}}=0.09{+-}0.25{+-}0.06, S{sub D*{sup -}}{sub D{sup +}}=-0.29{+-}0.33{+-}0.07, C{sub D*{sup -}}{sub D{sup +}}=0.17{+-}0.24{+-}0.04, S{sub D{sup +}}{sub D{sup -}}=-0.29{+-}0.63{+-}0.06, and C{sub D{sup +}}{sub D{sup -}}=0.11{+-}0.35{+-}0.06, where in each case the first error is statistical and the second error is systematic.

• OSTI ID: 20696496
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 13 Vol. 95; 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
CP INVARIANCE
D MINUS MESONS
D NEUTRAL MESONS
D PLUS MESONS
ERRORS
HADRONIC PARTICLE DECAY
STANFORD LINEAR ACCELERATOR CENTER
TIME DEPENDENCE