Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-07-13
Prog.Theor.Phys. 98 (1997) 1157-1164
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages, 3 figures
Scientific paper
10.1143/PTP.98.1157
We investigate the effect of SUSY phases ($\theta_A$ and $\theta_\mu$) on the $B^0_d - \bar{B}^0_d$ mixing in the minimal supergravity model. It is known that the complex phase $\theta_A$ $=$ arg($A$) ($A$ is the universal coefficient of the trilinear scalar couplings) is essentially unconstrained by the electric dipole moment experiment, while the phase $\theta_\mu$ $=$ arg($\mu$) ($\mu$ is the supersymmetric Higgsino mass) is strongly constrained to zero. We found that $\theta_A$ does not affect the phase of the $B^0_d - \bar{B}^0_d$ mixing matrix element $M_{12}(B)$ by numerical analysis of the renormalization group equations. This means that the measurement of the $B^0_d - \bar{B}^0_d$ mixing at the future B-factory could give the direct information on the parameters of the CKM matrix even in the framework of the minimal supergravity model with the SUSY phase $\theta_A$.
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