Measurements of charmless hadronic b{yields}s penguin decays in the {pi}{sup +}{pi}{sup -}K{sup +}{pi}{sup -} final state and first observation of B{sup 0}{yields}{rho}{sup 0}K{sup +}{pi}{sup -}
- Yonsei University, Seoul (Korea, Republic of)
- High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)
- Department of Physics, University of Tokyo, Tokyo (Japan)
We report measurements of charmless hadronic B{sup 0} decays into the {pi}{sup +}{pi}{sup -}K{sup +}{pi}{sup -} final state. The analysis uses a sample of 657x10{sup 6} BB pairs collected with the Belle detector at the KEKB asymmetric-energy e{sup +}e{sup -} collider at the resonance. The decay B{sup 0}{yields}{rho}{sup 0}K{sup +}{pi}{sup -} is observed for the first time; the significance is 5.0{sigma} and the corresponding partial branching fraction for M{sub K{pi}} is an element of (0.75,1.20) GeV/c{sup 2} is [2.8{+-}0.5(stat){+-}0.5(syst)]x10{sup -6}. We also obtain the first evidence for B{sup 0}{yields}f{sub 0}(980)K{sup +}{pi}{sup -} with 3.5{sigma} significance and for B{sup 0}{yields}{pi}{sup +}{pi}{sup -}K*{sup 0} with 4.5{sigma} significance. For the two-body decays B{sup 0}{yields}{rho}{sup 0}K*{sup 0} and B{sup 0}{yields}f{sub 0}(980)K*{sup 0}, the significances are 2.7{sigma} and 2.5{sigma}, respectively, and the upper limits on the branching fractions are 3.4x10{sup -6} and 2.2x10{sup -6} at 90% confidence level.
- OSTI ID:
- 21322541
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 80, Issue 5; Other Information: DOI: 10.1103/PhysRevD.80.051103; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
Similar Records
Dalitz analysis of three-body charmless B{sup 0}{yields}K{sup 0}{pi}{sup +}{pi}{sup -} decay
Time-dependent Dalitz plot measurement of CP parameters in B{sup 0}{yields}K{sub S}{sup 0}{pi}{sup +}{pi}{sup -} decays