Combined dE/dx estimation using both wires and pads

Provided by Tommaso Boccali, 19 April 1999.

Input arguments:

ITK

ALPHA track number of a charged reconstructed track.

NHYP

Number of hypotheses the user wishes to try. If NHYP=1, then RMASS, Q, and EXTIM may be scalar variables.

RMASS(nhyp)

Array of masses, one for each hypothesis.

Q(nhyp)

Array of charges, one for each hypothesis.

Output arguments:

NS

Number of wires on the track, -1 if none.

XNPAD

Number of pads on the track (Floating !), -1. if none.

EXTIM(nhyp)

(ri-riexp)/$\sigma$ for each particle hypothesis.

IER

Error return code
=0: an estimator was computed;
=1: no information available.