Decay rates and electromagnetic transitions of heavy quarkonia

  • The electromagnetic radiative transition widths for heavy quarkonia, as well as digamma and digluon decay widths, are computed in the framework of the extended harmonic confinement model (ERHM) and Coulomb plus power potential (CPPv) with varying potential index v. The outcome is compared with the values obtained from other theoretical models and experimental results. While the mass spectra, digamma and digluon widths from ERHM as well as CPPv=1 are in good agreement with experimental data, the electromagnetic transition widths span over a wide range for the potential models considered here making it difficult to prefer a particular model over the others because of the lack of experimental data for most transition widths.
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J. N. Pandya, N. R. Soni, N. Devlani and A. K. Rai. Decay rates and electromagnetic transitions of heavy quarkonia[J]. Chinese Physics C, 2015, 39(12): 123101. doi: 10.1088/1674-1137/39/12/123101
J. N. Pandya, N. R. Soni, N. Devlani and A. K. Rai. Decay rates and electromagnetic transitions of heavy quarkonia[J]. Chinese Physics C, 2015, 39(12): 123101.  doi: 10.1088/1674-1137/39/12/123101 shu
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Received: 2014-12-23
Revised: 2015-06-26
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    Supported by University Grants Commission, India for Major Research Project F. No.42-775/2013(SR) (J N Pandya) and Dept. of Science and Technology, India, under SERC fast track scheme SR/FTP/PS-152/2012 (A K Rai)

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Decay rates and electromagnetic transitions of heavy quarkonia

    Corresponding author: J. N. Pandya,
Fund Project:  Supported by University Grants Commission, India for Major Research Project F. No.42-775/2013(SR) (J N Pandya) and Dept. of Science and Technology, India, under SERC fast track scheme SR/FTP/PS-152/2012 (A K Rai)

Abstract: The electromagnetic radiative transition widths for heavy quarkonia, as well as digamma and digluon decay widths, are computed in the framework of the extended harmonic confinement model (ERHM) and Coulomb plus power potential (CPPv) with varying potential index v. The outcome is compared with the values obtained from other theoretical models and experimental results. While the mass spectra, digamma and digluon widths from ERHM as well as CPPv=1 are in good agreement with experimental data, the electromagnetic transition widths span over a wide range for the potential models considered here making it difficult to prefer a particular model over the others because of the lack of experimental data for most transition widths.

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