Study of the Flavour Changing Neutral Current Decay mode $B\to K \gamma   \gamma $
  We study the neutral current flavour changing rare decay mode $B\to K \gamma \gamma $ within the framework of Standard Model, including the long distance contributions. It is found that these long distance contributions can larger than the short distance contribution. 
S.R.Choudhury (a), G.C.Joshi (b), Namit Mahajan (a) and B.H.J.McKellar   (b) ((a)Univ. of Delhi, (b)Univ. of Melbourne)