Dear Collaborators,
Here are some distributions from pp runs.
- from run 6240: MRS 90 2B:
~600K Total Triggers
~60K Trigger3 (MRS Trigger)
- What fraction of the MRS event has BB vertex/t0?
"MRS track projection at Beam (cm) with and without BB vertex/t0"
http://pii3.brahms.bnl.gov/~jhlee/brahms/analysis/pp/vtx_bb_no_bb.ps
- So we cannot rely on BB for the t0. TMrs counters are installed to do
the job for the pp runs. If you haven't seen TMrs counters, check
http://www.sdcc.bnl.gov/brahms/photos.html.
~99% of MRS tracks have t0's from the counter.
How good is the timing resolution of TMrs counter?
"x from timing - x from track projection in TMrs[0]"
http://pii3.brahms.bnl.gov/~jhlee/brahms/analysis/pp/t0_res.ps
- How about a 2-d correlation?
"x from timing vs x from track projection" in TMrs:
http://pii3.brahms.bnl.gov/~jhlee/brahms/analysis/pp/trms_x_vs_track_x.ps
- pt distribution?
http://pii3.brahms.bnl.gov/~jhlee/brahms/analysis/pp/pt_run_6240.ps
- If we measure a tof from (TMrs Back - TMrs Front), can we do pid with it?
"tof vs p" using TMrs:
http://pii3.brahms.bnl.gov/~jhlee/brahms/analysis/pp/tmrs_tof_vs_p.ps
- "tof vs p" using TOFW (t0 from TMrs):
http://pii3.brahms.bnl.gov/~jhlee/brahms/analysis/pp/tof_vs_p_6240.ps
- m2 for positive and negative particles:
http://pii3.brahms.bnl.gov/~jhlee/brahms/analysis/pp/m2_6240.ps
JH
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