Branching Fractions and CP Asymmetries in B{sup 0}{yields}{pi}{sup 0}{pi}{sup 0}, B{sup +}{yields}{pi}{sup +}{pi}{sup 0}, and B{sup +}{yields}K{sup +}{pi}{sup 0} Decays and Isospin Analysis of the B{yields}{pi}{pi} System
Journal Article
·
· Physical Review Letters
- Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux (France)
- Universitad Autonoma de Barcelona, E-08193 Bellaterra, Barcelona (Spain)
- Dipartimento di Fisica and INFN, Universita di Bari, I-70126 Bari (Italy)
- Institute of High Energy Physics, Beijing 100039 (China)
- Institute of Physics, University of Bergen, N-5007 Bergen (Norway); and others
Based on a sample of 227x10{sup 6} BB pairs collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC, we measure the branching fraction B(B{sup 0}{yields}{pi}{sup 0}{pi}{sup 0})=(1.17{+-}0.32{+-}0.10)x10{sup -6}, and the asymmetry C{sub {pi}}{sub {sup 0}}{sub {pi}}{sub {sup 0}}=-0.12{+-}0.56{+-}0.06. The B{sup 0}{yields}{pi}{sup 0}{pi}{sup 0} signal has a significance of 5.0{sigma}. We also measure B(B{sup +}{yields}{pi}{sup +}{pi}{sup 0})=(5.8{+-}0.6{+-}0.4)x10{sup -6}, B(B{sup +}{yields}K{sup +}{pi}{sup 0})=(12.0{+-}0.7{+-}0.6)x10{sup -6}, and the charge asymmetries A{sub {pi}}{sub {sup +}}{sub {pi}}{sub {sup 0}}=-0.01{+-}0.10{+-}0.02 and A{sub K{sup +}}{sub {pi}}{sub {sup 0}}=0.06{+-}0.06{+-}0.01. Using isospin relations, we find an upper bound on the angle difference vertical bar {alpha}-{alpha}{sub eff} vertical bar of 35 deg. at the 90% C.L.
- OSTI ID:
- 20696256
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 18 Vol. 94; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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