Alladi Ramakrishnan Hall

Diluting Quark Flavor Hierarchies Using Dihedral Symmetry

Dipankar Das

IIT Indore

In this presentation, I intend to address the so-called "flavor puzzle" in SM, i.e., the apparent arbitrariness of the fermion masses and mixings. I will present a D4 flavored extension of the SM which provides an intuitive reasoning for the masses and mixing patterns in the quark sector. In this model, the Cabibbo mixing angle becomes related to the ratio of two vacuum expectation values. The orders of magnitude of the CKM matrix elements are readily obtained from the hierarchical nature of the vacuum expectation values. Moreover, I will also argue that the smallness of the off-Cabibbo elements in the CKM matrix is strongly connected to the heaviness of the third generation of quarks.