CLAS Physics Database

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Measurement E18M38

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Experiment: E89-004, 2005

Spokespersons: R. A. Schumacher

Experiment comment: Correlated data on W & cos(theta) distribution are available in E18M37 and E18M38 measurements.

Publication:

R. Bradford, R. A. Schumacher, and CLAS Collaboration First Measurement of Beam-Recoil Observables Cx and Cz in Hyperon Photoproduction // Submitted to Physical Review C

Quantity measured: C_z, dimensionless
Spin transfer coefficient C_z for circularly polarized photon beam and recoiling polarized hyperons.
Beam: γ, polarization: circular
Target: p (Z=1, A=1), polarization: none
Final state: K⁺ Λ, polarization: none

W :	1.679 — 2.454 GeV
E_γ :	0 GeV

Select data slice:
W = GeV

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

Parameter (X axis): cos(θ), dimensionless

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Measured data:

W, GeV	cos(θ), dimensionless	C_z, dimensionless	Data errors, dimensionless
1.679	-0.75	0	0
1.679	-0.55	0.698	0.542
1.679	-0.35	0.686	0.23
1.679	-0.15	0.812	0.172
1.679	0.05	0.917	0.16
1.679	0.25	0.838	0.154
1.679	0.45	0.555	0.131
1.679	0.65	0.821	0.135
1.679	0.85	0.901	0.189
1.734	-0.75	0	0
1.734	-0.55	0.451	0.28
1.734	-0.35	0.742	0.179
1.734	-0.15	0.94	0.135
1.734	0.05	1.004	0.117
1.734	0.25	0.983	0.11
1.734	0.45	0.752	0.085
1.734	0.65	0.893	0.084
1.734	0.85	1.017	0.111
1.787	-0.75	0.974	0.426
1.787	-0.55	1.002	0.205
1.787	-0.35	0.762	0.14
1.787	-0.15	0.848	0.113
1.787	0.05	0.779	0.102
1.787	0.25	0.983	0.088
1.787	0.45	0.905	0.087
1.787	0.65	1.021	0.077
1.787	0.85	1.001	0.1
1.839	-0.75	0.982	0.238
1.839	-0.55	0.869	0.146
1.839	-0.35	1.067	0.112
1.839	-0.15	1.067	0.094
1.839	0.05	0.891	0.098
1.839	0.25	0.943	0.074
1.839	0.45	1.016	0.066
1.839	0.65	0.998	0.064
1.839	0.85	0.998	0.08
1.889	-0.75	1.125	0.149
1.889	-0.55	0.954	0.117
1.889	-0.35	1.203	0.101
1.889	-0.15	1.044	0.086
1.889	0.05	0.9	0.08
1.889	0.25	1.076	0.069
1.889	0.45	0.881	0.066
1.889	0.65	0.966	0.063
1.889	0.85	1.075	0.076
1.939	-0.75	0.914	0.124
1.939	-0.55	0.723	0.105
1.939	-0.35	1.062	0.096
1.939	-0.15	0.928	0.084
1.939	0.05	0.91	0.074
1.939	0.25	0.886	0.063
1.939	0.45	0.853	0.058
1.939	0.65	1.011	0.054
1.939	0.85	1.051	0.066
1.987	-0.75	0.554	0.141
1.987	-0.55	0.632	0.129
1.987	-0.35	0.731	0.123
1.987	-0.15	0.897	0.097
1.987	0.05	1.001	0.078
1.987	0.25	0.829	0.062
1.987	0.45	0.925	0.053
1.987	0.65	0.941	0.054
1.987	0.85	0.893	0.107
2.035	-0.75	0.472	0.136
2.035	-0.55	0.229	0.149
2.035	-0.35	0.554	0.163
2.035	-0.15	0.608	0.115
2.035	0.05	0.801	0.089
2.035	0.25	0.843	0.064
2.035	0.45	1.022	0.057
2.035	0.65	0.886	0.047
2.035	0.85	0.942	0.09
2.081	-0.75	0.422	0.174
2.081	-0.55	0.207	0.192
2.081	-0.35	0.469	0.189
2.081	-0.15	0.489	0.15
2.081	0.05	0.989	0.112
2.081	0.25	0.85	0.08
2.081	0.45	0.946	0.068
2.081	0.65	0.831	0.103
2.081	0.85	0.87	0.063
2.126	-0.75	0.778	0.174
2.126	-0.55	0.499	0.177
2.126	-0.35	0.352	0.205
2.126	-0.15	0.786	0.149
2.126	0.05	0.743	0.125
2.126	0.25	0.922	0.083
2.126	0.45	1.048	0.272
2.126	0.65	0.726	0.239
2.126	0.85	0.691	0.068
2.17	-0.75	0.469	0.171
2.17	-0.55	0.533	0.175
2.17	-0.35	0.486	0.22
2.17	-0.15	0.621	0.175
2.17	0.05	0.908	0.141
2.17	0.25	1.045	0.092
2.17	0.45	1.045	0.196
2.17	0.65	0.834	0.061
2.17	0.85	0.655	0.071
2.212	-0.75	0.987	0.204
2.212	-0.55	0.76	0.197
2.212	-0.35	0.569	0.198
2.212	-0.15	0.425	0.231
2.212	0.05	0.858	0.158
2.212	0.25	0.886	0.106
2.212	0.45	1.042	0.099
2.212	0.65	0.761	0.074
2.212	0.85	0.676	0.074
2.255	-0.75	0.674	0.228
2.255	-0.55	0.962	0.231
2.255	-0.35	0.872	0.278
2.255	-0.15	0.365	0.229
2.255	0.05	0.576	0.213
2.255	0.25	1.08	0.138
2.255	0.45	1.061	0.13
2.255	0.65	0.698	0.081
2.255	0.85	0.576	0.087
2.296	-0.75	1.015	0.296
2.296	-0.55	0.487	0.372
2.296	-0.35	1.266	0.307
2.296	-0.15	0.502	0.326
2.296	0.05	1.016	0.322
2.296	0.25	0.779	0.189
2.296	0.45	1.147	0.128
2.296	0.65	0.638	0.099
2.296	0.85	0.61	0.121
2.338	-0.75	0.907	0.402
2.338	-0.55	1.412	0.416
2.338	-0.35	1.025	0.472
2.338	-0.15	0.932	0.429
2.338	0.05	0.866	0.317
2.338	0.25	0.499	0.293
2.338	0.45	1.439	0.17
2.338	0.65	0.508	0.386
2.338	0.85	0.36	0.172
2.377	-0.75	0.396	0.41
2.377	-0.55	0.281	0.669
2.377	-0.35	1.102	0.369
2.377	-0.15	1.17	0.471
2.377	0.05	0.525	0.596
2.377	0.25	0.39	0.29
2.377	0.45	0.809	0.235
2.377	0.65	0.698	0.145
2.377	0.85	0.504	0.164
2.416	-0.75	1.64	0.497
2.416	-0.55	1.58	0.624
2.416	-0.35	1.385	0.367
2.416	-0.15	0.649	0.478
2.416	0.05	0.587	0.459
2.416	0.25	-0.369	0.399
2.416	0.45	0.887	0.24
2.416	0.65	0.548	0.157
2.416	0.85	0.397	0.238
2.454	-0.75	0.667	0.61
2.454	-0.55	0	0.833
2.454	-0.35	-0.517	1.211
2.454	-0.15	1.129	0.618
2.454	0.05	-0.171	0.48
2.454	0.25	0.117	0.354
2.454	0.45	0.906	0.318
2.454	0.65	0.809	0.222
2.454	0.85	0.283	0.527