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Error projection for 19.6 dAu diE spectra

Updated on Mon, 2015-05-18 17:56. Originally created by yiguo on 2015-05-14 15:51.

Nev_pp = 375M/triggerBias, triggerBias = 0.64. Nev_dAu = 400M.
Nbin_dAu = 7.5, Npar_dAu = 8.3.
NchScale = (dNch/dy_19.6pp)/(dNch/dy_200pp)~1/1.5

Xsec_cc_pp200 = 0.8 mb.
Xsec_cc_pp19.6 = 8.2e-3 mb. Bingchu’s 19.6GeV analysis Note page 29
dNdyJpsi_pp200 = 2.44e-5. Phys. Rev. Lett., 98:232002, 2007
dNdyJpsi_pp19.6 = 116e-6 mb/32mb/1.4 Bingchu’s 19.6GeV analysis Note. page 27  inelastic cross section

Scale factor calculation:
scale_Npar = NchScale*Npar_dAu/2

scale_cc = Xsec19/Xsec200*Nbin_dAu

scale_Jpsi = dNdyJpsi19/dNdyJpsi200*Nbin_dAu.

Final:

S_dAu = S*(1-R(cc)-R(Jpsi))*scale_Npar+S*R(cc)*scale_cc+S*R(Jpsi)*scale_Jpsi.
R(*) is the ratio of * to the total cocktail. S is the RawYield of pp200GeV scaled by Nev difference.

Relative error = sqrt(1/S+2B/S^{2})  2B/S^{2} is assumed independent with the system size.

Mee<0.4 GeV/c2 Likesign background.
Mee>0.4 GeV/c2 MixEvent background.

 

 
 
 
 
 
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