Dilution
factor method |
Physics
Asymmetry plots |
Asymmetry
Top target |
Asymmetry
bottom target |
||||||||||||||
Fit c+he data (one
run) with g+p2 scale to NH3 data in region 0.7 < W< 0.85 Cuts abs(hsdelta)<8 and 0.8<(hsshtrk/hsp)<1.4 |
|
0.2074 +- 0.0033 | 0.2260 +- 0.0048 |
||||||||||||||
Extract C+he data ( multiple
runs) scale to NH3 data in region 0.7 < W< 0.85 Cuts abs(hsdelta)<8 and 0.8<(hsshtrk/hsp)<1.4 |
|
0.2125
+- 0.0033 |
0.2315
+- 0.0049 |
||||||||||||||
Extract C+he data ( multiple
runs) scale to NH3 data in region 0.7 < W< 0.80 Cuts abs(hsdelta)<8 and 0.8<(hsshtrk/hsp)<1.4 |
parallel | 0.2100 +- 0.0033 |
0.2282 +- 0.0049 |
||||||||||||||
Extract C+he data ( multiple runs) scale to NH3 data in region 0.7 < W< 0.85 Cuts abs(hsdelta)<12 and 0.8<(hsshtrk/hsp)<1.4 |
parallel |
|
|
||||||||||||||
Extract C+he data ( multiple runs) scale to NH3 data in region 0.6 < W< 0.85 Cuts abs(hsdelta)<12 and 0.8<(hsshtrk/hsp)<1.4 abs(hsxptar)<.12 abs(hsyptar)<.04 |
|
|
Dilution factor method | Physics
Asym plots |
Asymmetry Top target | Asymmetry bottom target | ||||||||||||||
Fit c+he data (one
run) with g+p2 scale to NH3 data in region 0.7 < W< 0.85 Cuts abs(hsdelta)<8 and 0.8<(hsshtrk/hsp)<1.4 |
perp | -0.1016 +- 0.0042 | -0.1028 +- 0.0045 | ||||||||||||||
Extract C+he data ( multiple
runs) scale to NH3 data in region 0.7 < W< 0.85 Cuts abs(hsdelta)<8 and 0.8<(hsshtrk/hsp)<1.4 |
perp | -0.1002
+- 0.0043 |
-0.0992
+- 0.0042 |
||||||||||||||
Extract C+he data ( multiple
runs) scale to NH3 data in region 0.7 < W< 0.80 Cuts abs(hsdelta)<8 and 0.8<(hsshtrk/hsp)<1.4 |
perp | -0.0981 +- 0.0041 | -0.0991 +- 0.0043 | ||||||||||||||
Extract C+he data ( multiple runs) scale to NH3 data in region 0.7 < W< 0.85 Cuts abs(hsdelta)<12 and 0.8<(hsshtrk/hsp)<1.4 |
perp |
|
|
||||||||||||||
Extract C+he data ( multiple runs) scale to NH3 data in region 0.6 < W< 0.85 Cuts abs(hsdelta)<12 and 0.8<(hsshtrk/hsp)<1.4 abs(hsxptar)<.12 abs(hsyptar)<.04 |
|
|
Field/Cup ( packing fraction) |
Data
(C+He)/(NH3) 0.6 < W< 0.85 |
MC
(C+He)/(N+He) 0.6 < W< 0.85 |
Inelastic
data/MC 1.1 < W < 1.4 |
Elastic
Data/MC 0.9 < W < 1.0 |
Perp/Top
(57.3) |
1.260 +-
0.013 (plot) |
1.22 +- 0.004(plot) | 1.11 (plot) | 1.02 (plot) |
Perp/Bottom
(59.5) |
1.209 +- 0.012 (plot) | 1.21 +- 0.004 (plot) | 1.12 (plot) | 0.98 (plot) |
Para/Top
(53.2) |
1.223 +- 0.009 (plot) | 1.27 +- 0.004 (plot) | 1.13 (plot) | 0.97 (plot) |
Para/Bottom
(54.7) |
1.256 +- 0.011 (plot) | 1.25 +- 0.004 (plot) | 1.09 (plot) | 0.91 (plot) |
Pn/abs(Ph) = -1*(0.312/abs(Ph)
+ 5.831e-02 + 8.935e-2*abs(Ph) + 8.685e-2*abs(Ph)^2)
for
each run and took average
weighted by the charge per run. When the W range is extended to 0.90
,the measured count asymmetry for perpendicular has a large change.
This is due to a tail of the elastic, so one can only include up to W =
0.85 GeV. Field
direction |
Target |
Pn/Ph |
Predicted
Corrected Count Asymmetry |
Measured
Corrected Count Asymmetry 0.7 < W< .85 abs(hsdelta)< 8. |
Measured
Corrected Count Asymmetry 0.7 < W< .90 abs(hsdelta) < 12. |
Measured
Corrected Count Asymmetry 0.7 < W< .85 abs(hsdelta) < 12. |
Parallel |
Top |
-.165 |
0.0008 |
0.0036 +- 0.0046 | 0.0031
+- 0.0024 |
0.0026
+- 0.0031 |
Parallel |
Bottom |
-.164 |
0.0008 |
-0.0059 +- 0.0059 | 0.0050
+- .0030 |
0.0036
+- 0.0039 |
Both |
0.000
+- 0.0036 |
0.0038
+- 0.0018 |
0.0029 +- 0.0024 | |||
Perpendicular |
Top |
-.160 |
-0.0004 |
0.0098 +- 0.0057 | 0.0033
+- 0.0030 |
0.011
+- 0.0039 |
Perpendicular |
Bottom |
-.171 |
-0.0004 |
0.0091 +- 0.0054 | 0.0042
+- 0.0032 |
0.0098
+- 0.0042 |
Both |
0.0094 +- 0.0039 | 0.0037
+- 0.0022 |
0.0105
+- 0.0029 |
Field
direction |
Target | Measured
Corrected Count Asymmetry 0.6 < W< .70 abs(hsdelta) < 12. |
Measured
Corrected Count Asymmetry 0.7 < W< .80 abs(hsdelta) < 12. |
Measured
Corrected Count Asymmetry 0.8 < W< .85 abs(hsdelta) < 12. |
Measured
Corrected Count Asymmetry 0.6 < W< .85 abs(hsdelta) < 12. |
Parallel |
Combined |
0.0020
+- 0.0060 |
0.0066
+- 0.0034 |
0.0000
+- 0.0034 |
0.0031
+- 0.0022 |
Perp |
Combined |
-0.0180
+- 0.0068 |
0.0115
+- 0.004 |
0.0094
+- 0.0041 |
0.006
+- 0.0026 |
Field
direction |
Target | Measured
Corrected Count Asymmetry 0.6 < W< .70 abs(hsdelta) < 12. abs(hsyptar)< .04 para use abs(hsxptar)< .12 perp use abs(hsxptar+.05)< .12 |
Measured
Corrected Count Asymmetry 0.7 < W< .80 abs(hsdelta) < 12. |
Measured
Corrected Count Asymmetry 0.8 < W< .85 abs(hsdelta) < 12. |
Measured
Corrected Count Asymmetry 0.6 < W< .85 abs(hsdelta) < 12. |
Parallel |
Combined |
0.0017
+- 0.0064 |
0.0072
+- 0.0036 |
-0.0002
+- 0.0037 |
0.0033
+- 0.0024 |
Perp |
Combined |
-0.0176
+- 0.0069 |
0.0114
+- 0.004 |
0.0092
+- 0.0041 |
0.0062
+- 0.0026 |
Field
Direction |
Measured
Nitrogen Physics Asymmetry |
Predicted
Nitrogen Physics Asymmetry |
Parallel |
0.0033/-.1645/.7/0.092 = -0.308 +- 0.223 | -A(p)/3 = -0.072 |
Perp |
0.0062/-.165/.7/0.092
= -0.574
+- 0.245 |
-A(p)/3 = 0.034 |
Target field |
Fit to MC ratio ( Yield C+He)/( Yield NH3
background) |
Parallel |
1.281
(0.015) - 0.044*W (0.011) |
Perpendicular |
1.254
(0.014) - 0.027*W (0.012) |
Target field | Plots |
Ratio in region 0.7 < W< 0.85 |
MC ratio at W =0.77 |
Parallel |
top versus bottom |
1.22
+- 0.009 ( Top target) , 1.26 +- 0.010 ( Bottom target) |
1.25 |
Perpendicular |
top versus bottom | 1.25 +- 0.011 ( Top target) , 1.22 +- 0.011 ( Bottom target) | 1.23 |
Target field |
Angular cuts (Average scattering angle) |
Plots of Count asymmetry |
Plots of Dilution factor |
Plots of Physics Asymmetry versus scattering angle |
Parallel |
11.5
, 12.225, 12.775, 13.425, 15. (11.92,12.50,13.08,13.98) |
parallel | parallel | parallel |
Perpendicular |
11.5,
12.4875, 13.0875, 13.8125, 16. ( 12.16,12.79,13.43,14.37) |
perpendicular | perpendicular | perpendicular |
Target field |
Angular cuts (average scattering angle) |
Plots of Count asymmetry |
Plots of Dilution factor |
Plots of Physics Asymmetry versus W |
Plots of Physics Asymmetry versus scattering angle |
||||
Parallel |
11.5
, 12.7625, 15. (12.39,13.77) (182.29,182.68) |
parallel | parallel | parallel |
|
||||
Perpendicular |
11.5,
13.0875, 16. (12.31,13.70) (171.6,168.24) |
perp | perp | perp |
|
Variable |
Del(Asym)/Del(Var) |
Del(Var) |
Del(Asym)
or Del(Asym)/Asym |
Scattering
angle |
0.0235
/deg or 0.0013 /mr |
0.5
mr |
0.0007
or 0.3% |
Polar
target angle |
0.0013
/deg |
0.1
deg (?) |
0.0001
or 0.06% |
Azimuthal
target angle |
0.0001/deg |
1
deg (?) |
0.0001
or 0.06% |
Beam
Energy |
0.004
/GeV |
0.003
GeV |
0.00001
or 0.006% |
Scattered
Electron energy |
0.005
/GeV |
0.005
GeV |
0.00003
or 0.018% |
Variable |
Del(R)/Del(Var) |
Del(Var) |
Del(R)
or Del(R)/R |
Scattering
angle |
0.0036
/mr |
0.5
mr |
0.0018
or 0.2% |
Polar
target angle |
0.010
/deg |
0.1
deg (?) |
0.001
or 0.1% |
Azimuthal
target angle |
0.004
/deg |
1
deg (?) |
0.004
or 0.45% |
Beam
Energy |
0.017
/GeV |
0.003
GeV |
0.00005
or 0.005% |
Scattered
Electron energy |
0.020
/GeV |
0.005
GeV |
0.0001
or 0.01% |
Dilution
factor |
|
1% |
1% |
Beam
Polarization |
2.5%
(abs) |
3.6% |
|
Target
Polarization |
2.9%
(relative) |
2.5% |
Target Field |
W
region |
Central Momentum |
Chi-sq/point
comparing average to value for each run |
Chi-sq/point
comparing average to value for each target polarization bin |
Para |
Elastic
|
4.723 |
1.1
(Bot) and 0.53 ( Top) |
1.79 (Bot) and 1.25 ( Top) |
Para |
Combine |
4.723 |
1.25 (Bot) and 1.02 ( Top) | 1.61 (Bot) and 0.16 ( Top) |
Para |
1.3
< W < 2.0 |
4.095 |
0.37 (Bot) and 0.73 ( Top) | 0.92 (Bot) and 0.92 ( Top) |
Perp |
Elastic |
4.723 |
0.84 (Bot) and 1.03 ( Top) | 1.09 (Bot) and 0.71 ( Top) |
Perp |
Combined |
4.723 |
0.46 (Bot) and 0.62 ( Top) | 0.41 (Bot) and 0.50 ( Top) |
Perp |
1.3 < W < 2.0 | 4.095 |
0.41 (Bot) and 0.61 ( Top) | 0.30 (Bot) and 0.18 ( Top) |