Exclusive decay of $J/Ψ$ into a lepton pair combined with light hadrons

Details Exclusive decay of $J/Ψ$ into a lepton pair combined with light hadrons Exclusive decay of $J/Ψ$ into a lepton pair combined with light hadrons

2001-03-22

arxiv.org/abs/hep-ph/0103236v1

Nucl.Phys. B602 (2001) 572-584

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, no figures. Latex-file

Scientific paper

10.1016/S0550-3213(01)00142-0

We study the exclusive decay of $J/\Psi$ into a lepton pair combined with light hadrons in the kinematic region, specified by that the total energy of the light hadrons is much smaller than $m_c$, the mass of the $c$-quark. In this region, the nonperturbaive effect related to $J/\Psi$ and that related to the light hadrons can be separated, the former is represented by a NRQCD matrix element, while the later is represented by a matrix element of a correlator of electric chromofields. The results are obtained in a axial gauge by assumming that contributions from two-gluon emmssion are dominant. But we can show that these results can be obtained without the assumption in arbitrary gauges. A discussion of the results are presented.

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