Measurement E151M1826

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:	A_LL
ε_L:	0.302
Q²:	0.2445 GeV²
W:	1475.0 GeV
E_beam:	1.9889 GeV
ε:	0.8314

Slice: cos(θ_π⁺) =

Measurement data
cos(θ_π⁺)	φ(π⁺), [deg]	A_LL	uncertainty
0.25	282.0	0.3728	0.7372
0.35	78.0	0.0462	0.8259
0.35	282.0	-1.4392	0.6785
0.35	294.0	-0.335	0.6967
0.45	282.0	-1.1438	0.7371
0.55	102.0	1.5121	0.7196
0.55	306.0	2.0348	0.6662
0.65	90.0	-1.1908	0.8079
0.65	102.0	-0.0832	0.6646
0.65	114.0	-0.6389	0.901
0.65	126.0	1.5361	0.661
0.65	234.0	-0.2695	0.7631
0.65	246.0	-0.1019	0.8434
0.75	90.0	1.2169	0.6899
0.75	102.0	1.0846	0.6581
0.75	114.0	0.3803	0.713
0.75	126.0	0.8835	0.6554
0.75	222.0	-0.0315	0.8407
0.75	234.0	1.0065	0.6872
0.75	246.0	-0.1373	0.828
0.75	258.0	0.6659	0.668
0.75	270.0	-0.3603	0.7632
0.85	66.0	0.8176	0.8003
0.85	78.0	1.3404	0.7183
0.85	102.0	1.1349	0.7539
0.85	114.0	0.3517	0.6462
0.85	126.0	-0.8628	0.7106
0.85	138.0	0.9875	0.7115
0.85	222.0	0.3834	0.6694
0.85	234.0	0.5443	0.6081
0.85	246.0	0.9092	0.6184
0.85	258.0	-0.28	0.5994
0.85	270.0	-0.7287	0.6009
0.95	222.0	0.7072	0.7153
0.95	258.0	1.1426	0.6321
0.95	270.0	0.9426	0.7296
0.95	282.0	-0.4504	0.5946
0.95	294.0	0.152	0.6354

CLAS Physics Database