IBDSel/job/Ibd.C zhangfh fn fit method
fn fit using ldj methods
fn method ,zero order:ldj,first order:zhangfh
change fn fit range to 12-60,add chi2/ndf
fn fit using ldj methods,change fn fit range to 12-60,add chi2/ndf
zhangfh fn fit method,change fn fit range to 12-60,add chi2/ndf
zhangfh fn fit method, fn fit range is 12-100,add chi2/ndf