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Measurement E151M85

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Experiment: EG4, 2016

Spokespersons: Xiaochao Zheng

Experiment comment: Final asymmetry results for the ep-> e pi+ (n) channel extracted from CLAS/EG4 data obtained using a longitudinally polarized beam and a longitudinally polarized NH3 target (CAA HS07-02).

No publications available for this experiment

Quantity measured: AUL,
Target spin asymmetry.
Beam: e, polarization: longitudinal
Target: p (Z=1, A=1), polarization: longitudinal
Final state: π+n, polarization: none

Q2 : 0.0084 GeV2
W : 1325 GeV
ε : 0.8418
Ebeam : 1.0539 GeV
εL: 0.0321 

Select data slice:
cos(θπ+) =
Observable quantity measured (Y axis): AUL,
Plot measurement data

Parameter (X axis): φ(π+), degrees

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Measured data:

cos(θπ+) φ(π+),
degrees 		AUL Data errors Systematic errors
0.45 42 1.2304 0.8181 0.1432
0.45 54 -0.9158 0.6 0.1084
0.55 42 -0.0456 0.6672 0.0304
0.55 54 0.7665 0.8179 0.0922
0.55 222 -0.1476 0.6984 0.0344
0.55 234 0.4609 0.5998 0.0604
0.55 246 0.0681 0.5635 0.031
0.55 258 -0.7315 0.5571 0.0885
0.65 42 1.049 0.7694 0.1231
0.65 210 2.047 0.7814 0.2348
0.65 222 0.8905 0.7378 0.1057
0.65 234 0.0684 0.4527 0.031
0.65 246 0.2999 0.5151 0.0454
0.65 258 0.4941 0.5623 0.0637
0.75 150 -1.1637 0.6055 0.1358
0.75 174 -0.398 0.7121 0.0543
0.75 222 -0.0392 0.5878 0.0303
0.75 234 0.5458 0.4952 0.069
0.75 246 0.3171 0.5206 0.0469
0.75 258 0.1379 0.5864 0.0339
0.85 222 0.4456 0.6468 0.0589
0.85 234 -0.1397 0.5584 0.0339
0.85 246 0.6709 0.5452 0.082
0.85 258 1.1065 0.6737 0.1294