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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/2256

Title: DECAY CONSTANT OF PSEUDO-SCALAR MESONS IN BETHE-SALPETER FRAMEWORK
Authors: Mekonnen, Molla
Advisors: Dr. Bhatnagar
Keywords: MESONS
PSEUDO-SCALAR
BETHE-SALPETER
Copyright: Jun-2009
Date Added: 3-May-2012
Abstract: We have employed the frame work of the Bethe-Salpeter equation under Covariant Instan- taneous Ansatz to calculate the leptonic decay constant of pion and have also reviewed calculation of leptonic decay constants of unequal mass pseudoscalar mesons. In the Dirac structure of BS wave function, the covariants are incorporated in accordance with a recently proposed power counting rule. The decay constants are calculated with incorpo- ration of both Leading-Orders (LO) as well as Next-to-Leading-Order (NLO) covariants. The main contribution of this thesis is an alternative derivation of pion leptonic decay constant which hopefully should raise the contribution of LO covariants in comparision to NLO covariants and hence validating the power counting rue for pion.
URI: http://hdl.handle.net/123456789/2256
Appears in:Thesis - Physics

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