Decay eta_b->J/ψJ/ψin light cone formalism

Details Decay eta_b->J/ψJ/ψin light cone formalism Decay eta_b->J/ψJ/ψin light cone formalism

2009-07-16

arxiv.org/abs/0907.2772v1

Phys.Rev.D81:014012,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 1 figure

Scientific paper

10.1103/PhysRevD.81.014012

The decays of pseudoscalar bottomonium eta_b into a pair of vector charmonia, J/\psi J/\psi, J/\psi \psi', \psi' \psi' are considered in the light cone formalism. Relativistic and leading logarithmic radiative corrections to the amplitudes of these processes are resummed. It is shown that the small value for the branching ratio of the decay eta_b-> J/\psi J/\psi obtained within the leading order nonrelativistic QCD is a consequence of a fine-tuning between certain parameters, which is broken when relativistic and leading logarithmic radiative corrections are taken into account. As a result, the branching ratio obtained in this paper is enhanced by an order of magnitude.

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