Study of scalar meson a{sub 0}(1450) from B{yields}a{sub 0}(1450)K* decays

Journal Article · Tue Mar 01 00:00:00 EST 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.054001· OSTI ID:21578177

Zhiqing, Zhang ^[1]

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1. Department of Physics, Henan University of Technology, Zhengzhou, Henan 450052 (China)

In the two-quark model supposition for the meson a{sub 0}(1450), which can be viewed as either the first excited state (scenario I) or the lowest lying state (scenario II), the branching ratios and the direct CP-violating asymmetries for decays B{sup -}{yields}a{sub 0}{sup 0}(1450)K*{sup -}, a{sub 0}{sup -}(1450)K*{sup 0} and B{sup 0}{yields}a{sub 0}{sup +}(1450)K*{sup -}, a{sub 0}{sup 0}(1450)K*{sup 0} are studied by employing the perturbative QCD factorization approach. We find the following results: (a) For the decays B{sup -}{yields}a{sub 0}{sup -}(1450)K{sup *0}, B{sup 0}{yields}a{sub 0}{sup +}(1450)K*{sup -}, a{sub 0}{sup 0}(1450)K*{sup 0}, their branching ratios in scenario II are larger than those in scenario I about one order. So it is easy for the experiments to differentiate between the scenario I and II for the meson a{sub 0}(1450). (b) For the decay B{sup -}{yields}a{sub 0}{sup 0}(1450)K*{sup -}, due to not receiving the enhancement from the K*-emission factorizable diagrams, its penguin operator contributions are the smallest in scenario II, which makes its branching ratio drop into the order of 10{sup -6}. Even so, its branching ratio in scenario II is still larger than that in scenario I about 2.5 times. (c) Even though our predictions are much larger than those from the QCD factorization results, they are still consistent with each other within the large theoretical errors from the annihilation diagrams. (d) We predict the direct CP-violating asymmetry of the decay B{sup -}{yields}a{sub 0}{sup -}(1450)K{sup *0} is small and only a few percent.

• OSTI ID: 21578177
• Journal Information: Physical Review. D, Particles Fields, Vol. 83, Issue 5; Other Information: DOI: 10.1103/PhysRevD.83.054001; (c) 2011 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
ASYMMETRY
BRANCHING RATIO
CP INVARIANCE
DIAGRAMS
ERRORS
FACTORIZATION
KAONS MINUS
PARTICLE DECAY
POTASSIUM IONS
QUANTUM CHROMODYNAMICS
QUARK MODEL
SCALAR MESONS
BOSONS
CHARGED PARTICLES
COMPOSITE MODELS
DECAY
DIMENSIONLESS NUMBERS
ELEMENTARY PARTICLES
FIELD THEORIES
HADRONS
INFORMATION
INTERACTIONS
INVARIANCE PRINCIPLES
IONS
KAONS
MATHEMATICAL MODELS
MESONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PSEUDOSCALAR MESONS
QUANTUM FIELD THEORY
STRANGE MESONS
STRANGE PARTICLES