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Advances in High Energy Physics
Volume 2017 (2017), Article ID 7306825, 8 pages
https://doi.org/10.1155/2017/7306825
Research Article

Radiative Decay Widths of Ground and Excited States of Vector Charmonium and Bottomonium

1Department of Physics, Samara University, P.O. Box 132, Samara, Ethiopia
2Department of Physics, University Institute of Sciences, Chandigarh University, Mohali 140413, India

Correspondence should be addressed to Hluf Negash

Received 26 January 2017; Accepted 14 May 2017; Published 20 June 2017

Academic Editor: Thierry Grandou

Copyright © 2017 Hluf Negash and Shashank Bhatnagar. 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 study the radiative decay widths of vector quarkonia for the process of and (for principal quantum numbers ) in the framework of Bethe-Salpeter equation under the covariant instantaneous ansatz using a form of BSE. The parameters of the framework were determined by a fit to the mass spectrum of ground states of pseudoscalar and vector quarkonia, such as , , , and . These input parameters so fixed were found to give good agreements with data on mass spectra of ground and excited states of pseudoscalar and vector quarkonia, leptonic decay constants of pseudoscalar and vector quarkonia, two-photon decays, and two-gluon decays of pseudoscalar quarkonia in our recent paper. With these input parameters so fixed, the radiative decay widths of ground and excited states of heavy vector quarkonia ( and ) are calculated and found to be in reasonable agreement with data.