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    User name riordan

    Log entry time 15:29:18 on March 20, 2006

    Entry number 167604

    This entry is a followup to: 167599

    keyword=Corrected Momentum for New Kinematic

    The polynomial I fit to achieve a better momentum can be set as an alias to the tree files:

    T->SetAlias("pcalc","(B.tr.p[0]+0.1+.14*B.tr.x[0]-0.1*(B.tr.x[0]*B.tr.x[0])+0.1*B.tr.y[0])")

    Most of the correction seems to come from the focal plane x and a constant 100MeV shift (see figure 1 from the referenced HALOG entry). Until I get the time to do a calibration as we did for the last kinematic, this is the most reliable momentum we have for the spectrometer.