Search

Non-Abelian discrete symmetry group S 3 × Z 3 has been used to construct quark mass matrices in the flavor basis. Interestingly, the case when M d is nondiagonal and M u is diagonal, is very much compatible with the presently refined data regarding the quark masses and mixing. However, the other case, when M u is nondiagonal and M d is diagonal, looks to be incompatible with the data. [ABSTRACT FROM AUTHOR]

In this paper, structural features of quark mass matrices have been analyzed in the flavor basis which is allowed by weak basis transformations in the Standard Model. Using the latest precised data pertaining to quark mixing matrix and small quark masses, we find that the texture structure of these cannot be simplified further. However, we find enormous amount of simplification is possible wherein we have found that a single phase in the mass matrix is adequate to accommodate the CP violating phase of CKM matrix. [ABSTRACT FROM AUTHOR]

In the context of precise measurements in some of the CKM elements and angles of the unitarity triangle coupled with latest theoretical improvements of lattice QCD calculations of "hadronic factors," we have explored the implication of these and unitarity on some of the CKM parameters which are ridden with ambiguities. In particular, we have undertaken a thorough scrutiny of the implications of the precise measurements of the angles of the unitarity triangle along with the element | V u s | , on the | V u b | , | V t d | , | V t s | , as well as the CP violating parameter K . Interestingly, we find a unitarity-based analysis while unambiguously favoring | V u b | exclusive-over-inclusive value which is also in agreement with the present data pertaining to K , | V t d | , | V t s | , Δ M d / Δ M s , etc. The present analysis also shows that the presence of NP in K − K ̄ and B d − B d ¯ systems, if any, would be less than a few percent only. [ABSTRACT FROM AUTHOR]