User name reinhold
Log entry time 07:31:02 on January27,2001
Entry number 55830
Followups:
keyword=KIN 3 statistics and cross sectionrun 1761: 440 count in [1.1:1.15] 325 mC
run 1762: 478 counts in [1.1:1.15] 320 mC
total of 918 counts for 645 mC = 4.03125e+18 electrons
15 cm LH2 = 6.36e23/cm^2
extended target acceptance roughly 83% (from y-tar distribution) ==> 5.28e23/cm^2
gamma-flux 0.478/10**3GeV/sr (from qethet2)
Jacobian 0.0594 (from qethet2)
solid angle 0.006 sr (both HRS)
electron acceptance roughly 4.8% ==> 0.131 GeV
dSigma/dE/dOmega/dOmega-lab = 918./4.03e18/5.28e23/0.006/0.006/0.131=9.14e-35cm^2/GeV/sr/sr
dSigma/dOmega-CM= (0.0594/0.478e-3)*9.14e-35cm^2/sr=1.14e-32cm^2/sr=11nb/sr
kaon survival probability roughly 23% ==> 48nb/sr
no radiative correction and efficiency corrections applied
Harvar-Cornell Q2=1.98 W=2.15 sigma=193nb/sr
Q2=2.00 W=2.66 sigma=137nb/sr
roughly 180 counts in sigma peak
FIGURE 1
FIGURE 2
