L= (n_b*f*N_1*N_2) / 4*pi*sigma_x*sigma_y*sqrt(1+(thetha*sigma_z/2*sigma_x)^2)
n_b: number of colliding pairs for CMS on supertable (01.01.2012 - 31.12.2012)
f: stable beam duration on supertable (01.01.2012 - 31.12.2012)
L= (my calculation on excel) = 1,58E+42
But i must found 23^fb-1...