Parametrization of flavor mixing in the standard model

On the Parametrization of Flavor Mixing in the Standard Model

It is shown that there exist nine di erent ways to describe the avor mixing, in terms of three rotation angles and one CP -violating phase, within the standard electroweak theory of six quarks. For the assignment of the complex phase there essentially exists a continuum of possibilities, if one allows the phase to appear in more than four elements of the mixing matrix. If the phase is restricte...

Rephasing invariant parametrization of flavor mixing matrices

Xsγ in minimal supersymmetric standard model with general flavor mixing ∗

We present the results of our analysis on b → sγ in the minimal supersymmetric standard model with a general flavor mixing in the squark sector. We identify the next–to–leading order focusing effect, which considerably reduces the gluino contribution to b → sγ relative to the leading order calculation. We illustrate that BR(B → Xsγ) is still very sensitive to the flavor mixing parameters, δd LL...

Renormalization Effect on Large Neutrino Flavor Mixing in the Minimal Supersymmetric Standard Model

In the minimal supersymmetric standard model, we have studied the evolution of the neutrino flavor mixing by using the renormalization group equation(RGE) with the Georgi-Jarlskog texture for the Yukawa coupling matrices. For the large Yukawa coupling of the charged lepton, i.e., tanβ ≫ 1, the neutrino flavor mixing increases significantly with running down to the electroweak scale by the RGE. ...

B → X S Γ in Minimal Supersymmetric Standard Model with General Flavor Mixing * I Introduction

We present the results of our analysis on b → sγ in the minimal supersymmetric standard model with a general flavor mixing in the squark sector. We identify the next–to–leading order focusing effect, which considerably reduces the gluino contribution to b → sγ relative to the leading order calculation. We illustrate that BR(B → Xsγ) is still very sensitive to the flavor mixing parameters, δd LL...