CLAS Physics Database

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Measurement E8M2

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Experiment: E89-038 CLAS experiment, 1999

Spokespersons: V. Burkert, R. Minehart

Experiment comment: Beam energy 1.515 GeV. Global 5.8% scaling systematic uncertainty for all data points

Measurement comment: Global 5.8% scaling systematic uncertainty

Publication:

under preparation //

Quantity measured: dσ/dΩ, mcbn/sterad
Differential cross section.
Beam: e, polarization: none
Target: p (Z=1, A=1), polarization: none
Final state: π⁺n, polarization: none

Q² :	0.25 — 0.35 GeV²
W :	1.12 — 1.14 GeV
E_beam :	1.515 GeV

Select data slice:
θ_π = deg

Fit φ dependence:

Observable quantity measured (Y axis): dσ/dΩ, mcbn/sterad
Plot measurement data

Parameter (X axis): φ_π, deg

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

Click here to get calculated fit coefficients in text file, delimited with tabs.

Measured data:

θ_π, deg	φ_π, deg	dσ/dΩ, mcbn/sterad	Data errors, mcbn/sterad	Systematic errors, mcbn/sterad
7.5	15	5.764	1.163	0.6076
7.5	45	4.582	0.9815	0.5735
7.5	75	8.573	1.706	0.6391
7.5	105	6.917	1.453	0.616
7.5	135	4.866	0.9562	0.5831
7.5	165	6.476	1.249	0.6385
7.5	195	7.405	1.873	0.6381
7.5	225	9.343	2.345	0.7123
7.5	255	6.814	1.398	0.6151
7.5	285	4.937	1.104	0.562
7.5	315	7.451	2.541	0.6038
7.5	345	4.171	1.011	0.5605
22.5	15	4.405	0.639	0.4228
22.5	45	4.336	0.569	0.4186
22.5	75	5.18	0.6376	0.4359
22.5	105	6.012	0.6157	0.4587
22.5	135	7.291	0.7579	0.4827
22.5	165	7.534	0.8016	0.4839
22.5	195	8.33	0.9668	0.4868
22.5	225	7.814	0.8495	0.4847
22.5	255	6.79	0.6939	0.4686
22.5	285	6.007	0.7058	0.4658
22.5	315	4.811	0.6551	0.4221
22.5	345	3.274	0.5243	0.4018
37.5	15	2.541	0.4198	0.478
37.5	45	2.824	1.492	0.4813
37.5	75	7.213	2.482	0.5618
37.5	105	7.289	0.9977	0.565
37.5	135	7.394	0.6708	0.5483
37.5	165	6.878	0.6351	0.5479
37.5	195	8.03	0.694	0.5708
37.5	225	7.32	0.6417	0.561
37.5	255	6.953	1.213	0.5441
37.5	285	10.19	4.623	0.6698
37.5	315	2.829	1.302	0.477
37.5	345	2.635	0.605	0.4768
52.5	15	1.149	0.3943	0.3449
52.5	45	3.748	1.096	0.3721
52.5	75	5.127	0.6289	0.4036
52.5	135	9.161	1.128	0.527
52.5	165	6.726	0.5796	0.4389
52.5	195	7.275	0.5868	0.4695
52.5	225	6.786	0.7779	0.4481
52.5	285	5.659	0.8659	0.4165
52.5	315	4.157	1.057	0.3902
67.5	45	3.93	0.4115	0.4407
67.5	75	5.905	0.4455	0.4717
67.5	105	7.515	0.858	0.5207
67.5	135	8.225	1.164	0.522
67.5	165	7.249	0.4544	0.5272
67.5	195	6.656	0.4171	0.5009
67.5	225	7.119	1.201	0.5067
67.5	255	7.256	1.111	0.5218
67.5	285	6.731	0.5185	0.4884
67.5	315	2.867	0.3283	0.425
82.5	45	3.363	0.4028	0.4717
82.5	75	5.952	0.4858	0.5131
82.5	105	8.147	0.5841	0.5603
82.5	135	7.681	1.505	0.5768
82.5	165	5.887	0.4557	0.5212
82.5	195	5.849	0.4405	0.5276
82.5	225	5.737	0.8511	0.5155
82.5	255	8.242	0.5552	0.5683
82.5	285	6.081	0.4666	0.5296
82.5	315	4.251	0.4278	0.4876
97.5	45	3.661	1.503	0.5
97.5	75	7.981	0.712	0.563
97.5	105	7.086	0.4622	0.5555
97.5	135	6.28	1.018	0.5302
97.5	165	5.958	0.5085	0.5178
97.5	195	5.182	0.4298	0.5303
97.5	225	7.366	1.936	0.5525
97.5	255	8.206	0.5041	0.5952
97.5	285	6.534	0.5127	0.5459
97.5	315	4.382	1.377	0.5036
112.5	45	3.29	0.6064	0.5808
112.5	75	9.072	1.741	0.6678
112.5	105	8.858	0.6753	0.668
112.5	135	5.402	0.7103	0.6088
112.5	165	7.458	0.8388	0.6454
112.5	195	6.7	1.429	0.6433
112.5	225	8.468	3.12	0.627
112.5	255	8.091	0.5552	0.6488
112.5	285	8.106	1.664	0.647
112.5	315	5.657	1.266	0.5963
127.5	45	7.207	1.016	0.8287
127.5	75	7.954	1.643	0.844
127.5	105	10.64	1.445	0.9719
127.5	255	8.813	1.001	0.8679
127.5	315	7.149	1.146	0.8394
142.5	45	4.184	0.9885	0.4189
142.5	75	8.916	2.823	0.4189
142.5	315	8.568	2.792	0.4189