content_image/363957.jpg content_image/363954.jpg content_image/363955.jpg content_image/363956.jpg content_image/363952.jpg content_image/363953.jpg content_image/363950.jpg content_image/363951.jpg content_image/363949.jpg content_image/363948.jpg
asymmetry in B → X$_{s}$ l $^{+}$l − is sensitive to SM4. 

The CP asymmetry in B → X$_{s}$ l $^{+}$l − is defined as 

<img src='content_image/363957.jpg'>

where Br and Br represent the branching ratio of ¯ B → X$_{s}$l $^{+}$l − and its complex conjugate B → ¯ X$_{s}$l $^{+}$l − respectively. dBr/dz is given in eq. (21). The Wilson coefficients C tot 7 , C tot 9 , and C tot 10 can be written as 

where 

λ tt ′ = λ s t = V ∗ $_{tb}$V$_{ts}$ , (58) so that all three relevant Wilson coefficients are complex in general. The parameters ξ$_{i}$ are given by [55] 

<img src='content_image/363954.jpg'>

<img src='content_image/363955.jpg'>

<img src='content_image/363956.jpg'>

<img src='content_image/363952.jpg'>

<img src='content_image/363953.jpg'>

<img src='content_image/363950.jpg'>

<img src='content_image/363951.jpg'>

Here 

<img src='content_image/363949.jpg'>

with 

<img src='content_image/363948.jpg'>

