CLAS Physics Database

Measurement E151M631

Experiment: EG4
Year: 2016

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).
Spokesperson: Xiaochao Zheng
Reaction: ep → π+n
Polarization: beam (longitudinal), target (longitudinal)
Quantity: AUL
εL: 0.1604
Q2: 0.1435 GeV2
W: 1535.0 GeV
Ebeam: 1.9889 GeV
ε: 0.8323

Slice: cos(θπ+) =

Measurement data
cos(θπ+) φ(π+), [deg] AUL uncertainty
0.25 282.0 -0.1758 0.737
0.35 282.0 0.4126 0.7644
0.35 294.0 0.1361 0.7082
0.45 282.0 2.073 0.6074
0.45 294.0 0.3686 0.6176
0.55 114.0 -0.5079 0.6567
0.55 246.0 -0.0496 0.7795
0.55 270.0 1.6881 0.7545
0.55 282.0 0.5602 0.6859
0.65 54.0 -0.4228 0.6644
0.65 102.0 -0.2641 0.7292
0.65 114.0 -0.4126 0.6655
0.65 126.0 0.3014 0.6302
0.65 150.0 1.224 0.841
0.65 222.0 0.1759 0.7207
0.65 234.0 2.5479 2.5479
0.65 294.0 1.4215 0.8318
0.75 102.0 -0.4108 0.6874
0.75 114.0 -0.6791 0.6861
0.75 126.0 -0.1227 0.6136
0.75 138.0 -1.4763 0.5543
0.75 210.0 -0.1186 0.7513
0.75 222.0 0.1498 0.5294
0.75 234.0 1.1757 0.5955
0.75 246.0 1.2316 0.5847
0.75 258.0 -0.4427 0.6929
0.75 282.0 2.5133 2.5133
0.85 78.0 -0.1725 0.6997
0.85 90.0 -0.091 0.5942
0.85 114.0 -0.017 0.6696
0.85 138.0 -0.6446 0.6847
0.85 198.0 2.2143 0.6783
0.85 210.0 1.6346 0.7626
0.85 222.0 0.3388 0.7403
0.85 234.0 -0.2755 0.4903
0.85 246.0 -0.0564 0.5894
0.85 258.0 0.344 0.6372
0.85 270.0 1.105 0.6978
0.95 102.0 -0.6221 0.5477
0.95 222.0 -0.8924 0.4792
0.95 234.0 1.3219 0.5625
0.95 258.0 1.4206 0.5283
0.95 270.0 0.1591 0.5279