This is the updated preliminary request of lambda at 5.2 and 6.2 GeV. Compared with before,There are some modification. 1. remove the fitting function of dNdy(fig 5 and 6) 2. The 4pi yield plot is replaced with midrapidity(fig7). 3. add double gaussian to fit dNdy, the fitting function double gaussian and cosh of dNdy are consistent. I put it on backup.