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Title: Resolution to the B{yields}{pi}K puzzle

We calculate the important next-to-leading-order contributions to the B{yields}{pi}K, {pi}{pi} decays from the vertex corrections, the quark loops, and the magnetic penguins in the perturbative QCD approach. It is found that the latter two reduce the leading-order penguin amplitudes by about 10% and modify only the B{yields}{pi}K branching ratios. The main effect of the vertex corrections is to increase the small color-suppressed tree amplitude by a factor of 3, which then resolves the large difference between the direct CP asymmetries of the B{sup 0}{yields}{pi}{sup {+-}}K{sup {+-}} and B{sup {+-}}{yields}{pi}{sup 0}K{sup {+-}} modes. The puzzle from the large B{sup 0}{yields}{pi}{sup 0}{pi}{sup 0} branching ratio still remains.
Authors:
 [1] ;  [2] ;  [3]
  1. Institute of Physics, Academia Sinica, Taipei, Taiwan 115 (China) and Department of Physics, National Cheng-Kung University, Tainan, Taiwan 701 (China)
  2. Department of Physics, Tohoku University, Sendai 980-8578 (Japan)
  3. Department of Physics, Nagoya University, Nagoya 464-8602 (Japan)
Publication Date:
OSTI Identifier:
20774425
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 72; Journal Issue: 11; Other Information: DOI: 10.1103/PhysRevD.72.114005; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; AMPLITUDES; ASYMMETRY; B MESONS; BRANCHING RATIO; COLOR MODEL; CORRECTIONS; CP INVARIANCE; FEYNMAN DIAGRAM; HADRONIC PARTICLE DECAY; KAONS MINUS; KAONS PLUS; PIONS NEUTRAL; QUANTUM CHROMODYNAMICS; QUARKS; RESOLUTION