Home » Detector Sub-systems » FGT » FGT . . . . . . . . . . A N A L Y S I S » Estimation of error of A_L including detector response, May 2008 (Jan)

study 9b sensitivity at mid rapidity LT=10/pb Pol=50% or 60%

 Projection of STAR sensitivity for AL for W+,W-  at mid rapidity for LT=10/pb and pol=60% or 50%

Common assumptions:

  • LT=10 pb -1
  • beam pol=60% or 50% 
  • W reco efficiency 70%
  • no losses due to the vertex cut 
  • integrated over eta [-1,+1] 
  • see remaining details in  study 9 sensitivity of STAR at forward & mid rapidity 
    •   
    Estimated significance of STAR measurement
    beam pol  avr AL(W+)THEORY=0.35
    		 .  avr AL(W-)THEORY=0.15
    sig ALSTAR STAR signifcance   sig ALSTARSTAR signifcane
     50%  0.092  3.8 sigma    0.18  0.8 sigma
     60%  0.077  4.6 sigma    0.15  1 sigma

Fig 1,   Pol=60% ( PS.zip )

  Dashed area denotes pt-averaged statistical error of STAR measurement.

 

Fig 2,   Pol=50% ( PS.zip )