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Advances in High Energy Physics
Volume 2014, Article ID 841703, 6 pages
http://dx.doi.org/10.1155/2014/841703
Research Article

Eta Prime Gluonic Contribution to the Nucleon Self-Energy in an Effective Theory

1SPMS, Thapar University, Patiala, Punjab 147004, India
2M.S. University of Baroda, Vadodara, Gujarat 390002, India

Received 8 May 2014; Accepted 18 June 2014; Published 7 July 2014

Academic Editor: Alexey A. Petrov

Copyright © 2014 A. Upadhyay and J. P. Singh. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The publication of this article was funded by SCOAP3.

Abstract

We estimate a possible gluonic contribution to the self-energy of a nucleon in an effective theory. The couplings of the topological charge density to nucleons give rise to OZI violating -nucleon interactions. The one-loop self-energy of nucleon arising due to these interactions is studied using a heavy baryon chiral perturbation theory. The divergences have been removed using appropriate form factors. The nontrivial structure of the QCD vacuum has also been taken into account. The numerical results are sensitive to the choice of the regulator to a nonnegligible extent. We get the total contribution to the nucleon mass coming from its interaction with the topological charge density % of the nucleon mass.