Improved Measurements of CP-Violating Asymmetry Amplitudes in B{sup 0}{yields}{pi}{sup +}{pi}{sup -} Decays

Journal Article · Fri Oct 07 04:00:00 EDT 2005 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.95.151803· OSTI ID:20696537

Aubert, B; Barate, R; Boutigny, D; Couderc, F; Karyotakis, Y; Lees, J P; Poireau, V; Tisserand, V; Zghiche, A ^[1]; Grauges-Pous, E ^[2]; Palano, A; Pompili, A ^[3]; Chen, J C; Qi, N D; Rong, G; Wang, P; Zhu, Y S ^[4]; Eigen, G; Ofte, I; Stugu, B ^[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. Dipartimento di Fisica and INFN, Universita di Bari, I-70126 Bari (Italy)
4. Institute of High Energy Physics, Beijing 100039 (China)
5. Institute of Physics, University of Bergen, N-5007 Bergen (Norway); and others

We present updated measurements of the CP-violating parameters S{sub {pi}}{sub {pi}} and C{sub {pi}}{sub {pi}} in B{sup 0}{yields}{pi}{sup +}{pi}{sup -} decays. Using a sample of 227x10{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, we observe 467{+-}33 signal decays and measure S{sub {pi}}{sub {pi}}=-0.30{+-}0.17(stat){+-}0.03(syst) and C{sub {pi}}{sub {pi}}=-0.09{+-}0.15(stat){+-}0.04(syst)

• OSTI ID: 20696537
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 15 Vol. 95; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
ASYMMETRY
B NEUTRAL MESONS
CP INVARIANCE
HADRONIC PARTICLE DECAY
PIONS MINUS
PIONS PLUS
STANFORD LINEAR ACCELERATOR CENTER