PARAMETERS ! assumed_value pos_excurs neg_excurs ! tb0 1.532 +0.009 -0.009 ! B0 lifetime !! -- FourS parameters fb0 0.493 +0.009 -0.009 ! fraction of B0 at FourS chi 0.092 +0.002 -0.002 ! chi=chi_d*fb0 ! chi_d=0.186+/-0.004, fb0 = 0.493