Daq files with W events were reco w/ BFC "pp2009a ITTF BEmcChkStat QAalltrigs btofDat Corr3  beamLine -VFMinuit  VFPPVnoCTB -dstout -evout"

Event cuts:

• trigger ID=L2W
• prim vertex rank>0 ( to reject fake vertices)
• loop over tracks:
  • flag()>0
  • pt>0.5 GeV

Fig 1, day 76, runs 10076136,152,153,154,161

Fig 2, day 85, runs 10085132,133,136

Fig 3, day 86, ~20 runs , only L2W triggered events, bottom plots show only tracks with PT>1.0 GeV