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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/3120

Title: VECTOR MESON DECAY CONSTANTS WITH INCLUSION OF BOTH LO AND NLO DIRAC COVARIANTS IN HADRON-QUARK VERTEX
Authors: Yikdem, Mengesha
Advisors: Dr. Shashank Bhatnagar
Keywords: NLO DIRAC
HADRON-QUARK VERTEX
Copyright: Jul-2009
Date Added: 22-May-2012
Publisher: ADDIS ABABA UNIVERSITY
Abstract: The Bethe-Salpeter equation (BSE) provides a non-perturbativ method of treating the relativistic two-particle bound state problems on the basis of covariant instantaneous ansatz (CIA). On this basis, the structure of the hadron-quark vertex function 􀀀(ˆq) of vector mesons is derived from a QCD motivated Bethe-salpeter (BS) frame work and it is generalized to include various Dirac covariants (other than i .") from their complete set. They are incorporated in accordance with a naive power counting rule order-by-order in powers of the inverse of the meson mass. We study vector meson decay constants with inclusion of both the leading order (LO) and the next-to-leading order (NLO) Dirac Covariants, in addition to i .", in the Hadron-Quark vertex function 􀀀(ˆq) from their complete set on the basis of power counting rule through the frame work of BSE under covariant instantaneous ansatz. vi
URI: http://hdl.handle.net/123456789/3120
Appears in:Thesis - Physics

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