Implications of precision measurements on texture specific fermion mass matrices

TL;DR

This paper examines how precise measurements of fermion masses and mixing parameters constrain texture-specific mass matrices for quarks and neutrinos, ruling out certain neutrino mass hierarchies and degeneracies.

Contribution

It demonstrates the compatibility of Fritzsch-like texture 4 zero mass matrices with quark data and rules out specific neutrino mass scenarios based on current measurements.

Findings

Fritzsch-like texture 4 zero matrices fit quark data well

Inverted hierarchy and degenerate neutrino masses are incompatible with current data

Certain texture zero configurations are ruled out for neutrinos

Abstract

Implications of texture specific mass matrices have been investigated for both quarks and neutrinos. Interestingly, for the case of quarks Fritzsch-like texture 4 zero mass matrices have been found to be compatible with the present precisely known sin2\beta as well as other precise CKM matrix elements. In the case of leptonic mass matrices, for both Majorana and Dirac neutrinos we find that for texture 4, 5, 6 zero mass matrices the inverted hierarchy and degenerate scenarios of neutrino masses are ruled out by the present data.