Resolving B-CP puzzles in QCD factorization

Journal Article · Thu Oct 01 04:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.80.074031· OSTI ID:21325246

Cheng, H -Y ^[1]; Chua, C -K ^[2]

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1. Institute of Physics, Academia Sinica, Taipei, Taiwan 115 (China)
2. Department of Physics, Chung Yuan Christian University, Chung-Li, Taiwan 320 (China)

Within the framework of QCD factorization (QCDF), power corrections due to penguin annihilation can account for the observed rates of penguin-dominated two-body decays of B mesons and direct CP asymmetries A{sub CP}(K{sup -}{pi}{sup +}), A{sub CP}(K*{sup -}{pi}{sup +}), A{sub CP}(K{sup -}{rho}{sup 0}) and A{sub CP}({pi}{sup +}{pi}{sup -}). However, the predicted direct CP-violating effects in QCDF for B{sup -}{yields}K{sup -}{pi}{sup 0}, K{sup -}{eta}, {pi}{sup -}{eta} and B{sup 0}{yields}{pi}{sup 0}{pi}{sup 0} are wrong in signs when confronted with experiment. We show that subleading 1/m{sub b} power corrections to the color-suppressed tree amplitude due to spectator scattering or final-state interactions will yield correct signs for aforementioned CP asymmetries and accommodate the observed {pi}{sup 0}{pi}{sup 0} and {rho}{sup 0}{pi}{sup 0} rates simultaneously. Implications are discussed.

• OSTI ID: 21325246
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 7 Vol. 80; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
ANNIHILATION
ASYMMETRY
B MESONS
COLOR MODEL
CP INVARIANCE
ETA MESONS
FACTORIZATION
FINAL-STATE INTERACTIONS
KAONS MINUS
PARTICLE DECAY
PIONS MINUS
PIONS NEUTRAL
PIONS PLUS
QUANTUM CHROMODYNAMICS
SCATTERING
TWO-BODY PROBLEM