Light scalar mesons and charmless hadronic B{sub c}{yields}SP,SV decays in the perturbative QCD approach

Journal Article · Wed Sep 01 00:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.054029· OSTI ID:21432981

Liu, Xin; Xiao, Zhen-Jun ^[1]

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1. Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing, Jiangsu 210046 (China)

The scalar productions in heavy meson decays can provide a good platform to study not only heavy flavor physics but also their own physical properties in a dramatically different way. In this work, based on the assumption of two-quark structure of the scalars, the charmless hadronic B{sub c}{yields}SP,SV decays (here, S, P, and V denote the light scalar, pseudoscalar, and vector mesons, respectively) are investigated by employing the perturbative QCD (pQCD) factorization approach. In the standard model all these considered B{sub c} meson decays can only occur through the annihilation diagrams. From our numerical evaluations and phenomenological analysis, we find that (a) the pQCD predictions for the CP-averaged branching ratios (BRs) of the considered B{sub c} decays vary in the range of 10{sup -5} to 10{sup -8}, which will be tested in the ongoing LHCb and forthcoming Super-B experiments, while the CP-violating asymmetries for these modes are absent naturally in the standard model because only one type tree operator is involved; (b) for B{sub c}{yields}SP,SV decays, the BRs of {Delta}S=0 processes are basically much larger than those of {Delta}S=1 as generally expected because the different Cabibbo-Kobayashi-Maskawa factors are involved; (c) analogous to B{yields}K{sup *{eta}(')} decays, Br(B{sub c}{yields}{kappa}{sup +}{eta}){approx}5xBr(B{sub c}{yields}{kappa}{sup +}{eta}') in the pQCD approach, which can be understood by the constructive and destructive interference between the {eta}{sub q} and {eta}{sub s} contributions to the B{sub c}{yields}{kappa}{sup +}{eta} and B{sub c}{yields}{kappa}{sup +}{eta}' decays, however, Br(B{sub c}{yields}K{sub 0}{sup *}(1430){eta}) is approximately equal to Br(B{sub c}{yields}K{sub 0}{sup *}(1430){eta}{sup '}) in both scenarios because the factorizable contributions from the {eta}{sub s} term play the dominant role in the considered two channels; (d) if a{sub 0}(980) and {kappa} are the qq bound states, the pQCD predicted BRs for B{sub c}{yields}a{sub 0}(980)({pi},{rho}) and B{sub c}{yields}{kappa}K{sup (*)} decays will be in the range of 10{sup -6{approx}}10{sup -5}, which are within the reach of the LHCb experiments and could be measured in the near future; and (e) for the a{sub 0}(1450) and K{sub 0}{sup *}(1430) channels, the BRs for B{sub c}{yields}a{sub 0}(1450)({pi},{rho}) and B{sub c}{yields}K{sub 0}{sup *}(1430)K{sup (*)} modes in the pQCD approach are found to be (5{approx}47)x10{sup -6} and (0.7-36)x10{sup -6}, respectively. A measurement of them at the predicted level will favor the qq structure and help understand the physical properties of the scalars and the involved QCD dynamics in the modes, especially the reliability of the pQCD approach to these B{sub c} meson decays.

• OSTI ID: 21432981
• Journal Information: Physical Review. D, Particles Fields, Vol. 82, Issue 5; Other Information: DOI: 10.1103/PhysRevD.82.054029; (c) 2010 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
A0-980 MESONS
ANNIHILATION
ASYMMETRY
B C MESONS
BOUND STATE
BRANCHING RATIO
CP INVARIANCE
FACTORIZATION
FLAVOR MODEL
FORECASTING
INTERFERENCE
KAONS MINUS
PARTICLE DECAY
PARTICLE PRODUCTION
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUARKS
SCALAR MESONS
STANDARD MODEL
VECTOR MESONS
BEAUTY MESONS
BEAUTY PARTICLES
BOSONS
CHARM PARTICLES
CHARMED MESONS
COMPOSITE MODELS
DECAY
DIMENSIONLESS NUMBERS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
GRAND UNIFIED THEORY
HADRONS
INTERACTIONS
INVARIANCE PRINCIPLES
KAONS
MATHEMATICAL MODELS
MESONS
PARTICLE INTERACTIONS
PARTICLE MODELS
QUANTUM FIELD THEORY
QUARK MODEL
STRANGE MESONS
STRANGE PARTICLES
UNIFIED GAUGE MODELS