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summary_03_08_06

Summary 03/08/06


Coincident H(e,e'p) data was analyzed.

The position of the W, Em, Pmpar, Pmper, etc peaks of the data were determined and subtracted from the expected positions.  The resulting peaks should line up at zero.  Here is one example using the data at Ebeam=4.021 GeV.


The effects of radiation were subtracted from the peak positions, where the magnitude for W, Em, Pmpar, Pmper, etc were determined by running SIMC with the radiative corrections turned on and off.

Heep offsets were then determined that will center these peaks at zero (radiative effects included).  Here are the peaks after inserting the offsets:






The results from checking the kinematics using Hee'p are:
Ebeam(GeV)
 P hms(GeV)
 TH hms(deg)
 P sos(GeV)
 TH sos(deg)
 dE
 dth_ss
 dp_ss
 dth_hs
 dp_hs
 dssxptar
2.038
 -1.692
 25.005
 0.874
 54.90
 0.0
 0.8
 0.5
 -1.0
 1.5
 0.0036
5.012
 4.116
 18.70
 -1.7227
 50.00
 0.0
 -0.3
 10.2
 -0.2
 2.4
 0.008
5.766
 4.867
 16.19
 -1.6868
 51.61
 0.0
 0.05
 7.65
 0.05
 0.8
 0.0062
4.021
 3.232
 22.15
 -1.588
 50.00
 0.0
 0.0
 1.9
 -0.8
 2.15
 0.0052


SOS momentum saturation curve

Red data points are Tanja's results, and the dot-dashed curve is their parameterization -0.36-0.0632*exp(x**3.004)
Black data points are from the 2004 running period and the solid curve is the parameterization  -0.3844-0.01778*exp(x**3.3971)
P sos(GeV)
 dp_ss (heep)
 dp_ss (fit)
0.874
 0.5
 0.42
-1.7227
 10.2
 10.51
-1.6868
 7.65
 6.92
-1.588
 1.9
 2.57



SOS ssxptar offset  (dssxptar vs. P_sos)

The dashed line is the parameterization 0.00363+0.000001078*exp((x+1.0)**2.1)