Bounds on quark mass matrices elements due to measured properties of the mixing matrix and present values of the quark masses

Chaturvedi, S. ; Gupta, V. ; Sanchez-Colón, G. (2008) Bounds on quark mass matrices elements due to measured properties of the mixing matrix and present values of the quark masses International Journal of Modern Physics A, 23 . pp. 1729-1746. ISSN 0217-751X

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Abstract

We obtain constraints on possible structures of mass matrices in the quark sector by using as experimental restrictions the determined values of the quark masses at the MZ energy scale, the magnitudes of the quark mixing matrix elements Vud, Vus, Vcd, and Vcs, and the Jarlskog invariant J(V ). Different cases of specific mass matrices are examined in detail. The quality of the fits for the Fritzsch and Stech type mass matrices is about the same with χ2/dof = 4.23/3 = 1.41 and χ2/dof = 9.10/4 = 2.28, respectively. The fit for a simple generalization (one extra parameter) of the Fritzsch type matrices, in the physical basis, is much better with χ2/dof = 1.89/4 = 0.47. For comparison we also include the results using the quark masses at the 2 GeV energy scale. The fits obtained at this energy scale are similar to that at MZ energy scale, implying that our results are unaffected by the evolution of the quark masses from 2 to 91 GeV.

Item Type:Article
Source:Copyright of this article belongs to World Scientific Publishing Company.
ID Code:89822
Deposited On:02 May 2012 13:12
Last Modified:19 May 2016 04:15

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