Upsilon in d+Au 200 GeV Analysis

Vz and refMult

VertexZ

refmult

eta vs. nFitPoints

all primary tracks

primary tracks with trigger candidate

(project to a BEMC cluster && this cluster is a trigger candidate)

deuteron beam direction: eta>0

gold beam direction: eta<0

dEdx

all primary tracks

primary tracks with trigger candidate

                    2<p<3 GeV/c                                    3<p<4 GeV/c

                   4<p<5 GeV/c                                   5<p<6 GeV/c

black lines are for all primary tracks, red lines are for primary tracks with trigger candidate.

Upsilon Signals

cuts: |vz|<30cm && |eta|<1 && |nFitPoints|>=23 && dEdx cut for eID

like-sign BG calculation:  BG = 2 * sqrt(++  *  --)

If use BSMD

If require at least 1 BSMD hit for both eta and phi strips

Last modified at 2008-08-04 05:27:35 PM