CLAS Physics Database

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Measurement E151M134

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

Q² :	0.0291 GeV²
W :	1385 GeV
ε :	0.741
E_beam :	1.0539 GeV
ε_L:	0.0668

Select data slice:
cos(θ_π⁺) =

Observable quantity measured (Y axis): A_UL,
Plot measurement data

Parameter (X axis): φ(π⁺), degrees

Click here to get data in text file, delimited with tabs.

Measured data:

cos(θ_π⁺)	φ(π⁺), degrees	A_UL	Data errors	Systematic errors
0.25	30	1.4314	0.878	0.1656
0.25	42	0.8981	0.8324	0.1065
0.25	54	0.7677	0.8535	0.0924
0.35	30	-1.3869	0.6355	0.1606
0.35	42	0.1812	0.5477	0.0364
0.35	54	0.2884	0.5706	0.0445
0.35	66	-0.0357	0.8492	0.0303
0.45	18	0.2898	0.7599	0.0446
0.45	30	0.5652	0.5738	0.071
0.45	42	-0.1814	0.5577	0.0364
0.45	54	0.834	0.6579	0.0995
0.45	234	0.2241	0.8265	0.0394
0.45	246	2.0044	0.8266	0.23
0.45	258	-0.8859	0.7463	0.1052
0.55	30	1.6436	0.8816	0.1894
0.55	42	0.3124	0.5809	0.0465
0.55	54	1.112	0.6215	0.13
0.55	138	-0.3409	0.8426	0.049
0.55	222	-0.1483	0.6522	0.0344
0.55	234	-0.1596	0.609	0.0351
0.55	246	1.1064	0.5558	0.1294
0.55	258	-0.6705	0.4567	0.082
0.65	138	0.9318	0.7376	0.1102
0.65	150	-0.5307	0.6553	0.0674
0.65	162	0.549	0.8049	0.0693
0.65	174	0.5913	0.7957	0.0737
0.65	210	1.7732	0.8036	0.204
0.65	222	-0.0384	0.5328	0.0303
0.65	234	0.2955	0.4411	0.0451
0.65	246	0.1881	0.5326	0.0369
0.65	258	-0.0634	0.4674	0.0309
0.65	270	-0.1728	0.6105	0.0359
0.75	138	-0.7132	0.6134	0.0865
0.75	150	-0.4598	0.5426	0.0603
0.75	162	0.5188	0.6349	0.0662
0.75	174	-0.9891	0.6114	0.1165
0.75	186	1.1502	0.7552	0.1343
0.75	222	0.5394	0.6401	0.0683
0.75	234	-0.2532	0.4532	0.0416
0.75	246	-1.0075	0.3891	0.1185
0.75	258	0.3539	0.4776	0.0502
0.75	270	0.1689	0.6436	0.0356
0.85	222	0.216	0.6603	0.0388
0.85	234	-0.6867	0.405	0.0837
0.85	246	0.0833	0.4202	0.0315
0.85	258	0.3913	0.4618	0.0537
0.85	270	0.7964	0.6028	0.0954
0.95	234	0.2845	0.6253	0.0441
0.95	246	-0.4916	0.5099	0.0635
0.95	258	0.4164	0.5781	0.0561