Fit Type B:  Fit the mass peak for the signal region definition
Obtain the error on the signal region definition from that fit:
Mean: 3.09354
Sigma:0.0159857
Norm: 31801.6
Signal fraction: 0.901879+/-0.000930529
The Pt cut is: 4<= pt < 100
The fitted value of tau:       0.0458424+/-0.000684419
The fitted value of Lambda+:   0.0306152+/-0.00117847
The fitted value of Lambda-:   0.0208171+/-0.00125351
The fitted value of LambdaSym: 0.066+/-0.255934
The fitted value of F+:        0.159649+/-0.0053493
The fitted value of F-:        0.104079+/-0.00504507
The fitted value of FSym:      0.0237964+/-0.00203907
The fitted value of Scale:     1.04219+/-0.00543511
The fitted value of alpha:     0.900508+/-0.000910116
The fitted value of Bfrac:     0.185074+/-0.0026759