Article

# Study of B c → J / ψ π , η c π decays with perturbative QCD approach

Chinese Academy of Sciences Theoretical Physics Center for Science Facilities P.O. Box 918(4) Beijing 100049 China
European Physical Journal C (impact factor: 3.63). 02/2009; 60(1):107-117. DOI:10.1140/epjc/s10052-009-0872-y pp.107-117

ABSTRACT The B

c
→J/ψ
π, η

c

π decays are studied with the perturbative QCD approach. It is found that the form factors
A0,1,2Bc® J/yA_{0,1,2}^{B_{c}\to J/{\psi}}
and
F0Bc®hcF_{0}^{B_{c}\to{\eta}_{c}}
for the B

c
→J/ψ, η

c
transitions and the branching ratios are sensitive to the parameters ω, v, f

J/ψ
and
fhcf_{{\eta}_{c}}
, where ω and v are the parameters of the charmonium wave functions for a Coulomb potential and the harmonic-oscillator potential, respectively,
and f

J/ψ
and
fhcf_{{\eta}_{c}}
are the decay constants of the J/ψ and η

c
mesons, respectively. The large branching ratios and the clear signals of the final states make the B

c
→J/ψ
π, η

c

π decays the prospective channels for measurements at the hadron colliders.

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### Keywords

branching ratios

clear signals

Coulomb potential

decay constants

form factors

harmonic-oscillator potential

large branching ratios

perturbative QCD approach

prospective channels

π decays