Page History

Ordered list of goals leading to publication of W (and Z?) from pp500 STAR data from Run 9

...

1. BTOW
   1. relative gains
   2. absolute gains + uncertainty
2. tune W-algo
   1. find optimal working point for cuts
   2. evaluate stability of W yield vs. cut changes
   3. uniformity of W yield vs.
      1. time, also timtime-in-fill
      2. bXing, ratio per reconstructed vertex
      3. eta-phi (low/high pileup fills, beam background signature)
3. identify cosmic events in final event sample
4. visual inspection of all events identified as Ws (Lego plot of all detector layers)
5. Simulations
   1. Vet algo MC/Data
   2. estimate efficiency of W-algo as used
   3. Background model for what's under the Jacobian peak

...

Title: ... TBD...

data shown

• ration ratio of x-section(W-)/W+
• AL(W+), AL(W-)
• (if found) Z x-section
  describe -Describe charge sign discrimination technique (vertex+TPC+BSMD point)
  implication -Implication of x-section results in leading order interpretation

...

1. draft of paper #1 will be available in few months
2. new data production w/ improved TPC & vertex is desired
3. we will use BSMD fro for e+/e- --> requires new tracking afterburner
4. ...

...

1. do we need more filtered M-C QCD events for better background estimation for Zs ?
2. do we see Zs in the Endcap?
   (One leg with good track in the barrel, another w/o track in the endcap.)

List of task, TBD: assigned man power, status
( only those not mentioned in goal 1 or 2)

1. attempt e+/e- discrimination based on SL09b production
2. improve TPC calibration 'by 1 notch'
3. identify & correct reason for missing track at mid rapidity
4. evaluate accuracy of the beam line constrain
5. request new production
6. (if needed) run ~4x more filtered QCD background events for better estimation of background for Zs (also y2009 geometry may be now better)...