Measurement of cos2{beta} in B{sup 0}{yields}D{sup (*)}h{sup 0} Decays with a Time-Dependent Dalitz Plot Analysis of D{yields}K{sub s}{sup 0}{pi}{sup +}{pi}{sup -}

Journal Article · Fri Dec 07 04:00:00 EST 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.99.231802· OSTI ID:21024531

Aubert, B; Bona, M; Boutigny, D; Karyotakis, Y; Lees, J P; Poireau, V; Prudent, X; Tisserand, V; Zghiche, A ^[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 ^[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 study the time-dependent Dalitz plot of D{yields}K{sub S}{sup 0}{pi}{sup +}{pi}{sup -} in B{sup 0}{yields}D{sup (*)}h{sup 0} decays, where h{sup 0} is a {pi}{sup 0}, {eta}, {eta}{sup '}, or {omega} meson and D*{yields}D{pi}{sup 0}, using a data sample of 383x10{sup 6} {upsilon}(4S){yields}BB decays collected with the BABAR detector. We determine cos2{beta}=0.42{+-}0.49{+-}0.09{+-}0.13, sin2{beta}=0.29{+-}0.34{+-}0.03{+-}0.05, and |{lambda}|=1.01{+-}0.08{+-}0.02, where the first error is statistical, the second is the experimental systematic uncertainty, and the third, where given, is the Dalitz model uncertainty. Assuming the world average value for sin2{beta} and |{lambda}|=1, cos2{beta}>0 is preferred over cos2{beta}<0 at 86% confidence level.

• OSTI ID: 21024531
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 23 Vol. 99; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B NEUTRAL MESONS
D MESONS
DALITZ PLOT
KAONS NEUTRAL SHORT-LIVED
PAIR PRODUCTION
PARTICLE DECAY
PIONS MINUS
PIONS NEUTRAL
PIONS PLUS
TIME DEPENDENCE