$B^0 -\overline{B^0}$ mixing, $B\rightarrow J/\psi K_s$ and $B\rightarrow X_d \gamma$ in general MSSM

P. Ko; G. Kramer; Jae-hyeon Park

doi:doi:10.1140/epjc/s2002-01029-x

EPJ

a
b
c
d
e
ap
st
h
plus
ds
pv
ti
qt
am
n

2024 Impact factor 4.8

Particles and Fields

Eur. Phys. J. C 25, 615-622 (2002)
DOI: 10.1140/epjc/s2002-01029-x

$B^0 -\overline{B^0}$ mixing, $B\rightarrow J/\psi K_s$ and $B\rightarrow X_d \gamma$ in general MSSM

P. Ko¹, G. Kramer² and Jae-hyeon Park¹

¹ Department of Physics, KAIST, Daejeon 305-701, Korea
² II. Institut für Theoretische Physik, Universität Hamburg, 22761 Hamburg, Germany

(Received: 1 July 2002 / Published online: 24 September 2002 )

Abstract
We consider the gluino-mediated SUSY contributions to B⁰- $\overline{B^0}$ mixing, $B\rightarrow J/\psi K_s$ and $B\rightarrow X_d \gamma$ in the mass insertion approximation. We find that the (LL) mixing parameter can be as large as $\vert (\delta_{13}^d)_{\mathrm {{LL}}} \vert \lesssim 2 \times 10^{-1}$ , but the (LR) mixing is strongly constrained by the $B\rightarrow X_d \gamma$ branching ratio and we find $\vert (\delta_{13}^d)_{\mathrm {{LR}}} \vert \lesssim 10^{-2}$ . The implications for the direct CP asymmetry in $B\rightarrow X_d \gamma$ and the dilepton charge asymmetry ( A_ll) are also discussed, where substantial deviations from the standard model (SM) predictions are possible.