CLAS Physics Database

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Measurement E19M34

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Experiment: E89-004, 2005

Spokespersons: R. A. Schumacher

Experiment comment: Correlated data on W & cos(theta) distribution are available in E19M33 and E19M34 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⁺ Σ⁰, polarization: none

W :	1.787 — 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
1.787	-0.7	0	0
1.787	-0.4	0.689	0.519
1.787	-0.1	1.477	0.347
1.787	0.2	0.76	0.301
1.787	0.5	1.391	0.302
1.787	0.8	1.334	0.383
1.839	-0.7	0	0
1.839	-0.4	0.734	0.325
1.839	-0.1	1.092	0.208
1.839	0.2	1.019	0.189
1.839	0.5	0.744	0.184
1.839	0.8	0.585	0.279
1.889	-0.7	0.171	0.612
1.889	-0.4	0.475	0.239
1.889	-0.1	0.681	0.156
1.889	0.2	0.866	0.138
1.889	0.5	0.632	0.135
1.889	0.8	0.458	0.22
1.939	-0.7	1.482	0.619
1.939	-0.4	0.262	0.267
1.939	-0.1	1.075	0.162
1.939	0.2	0.528	0.142
1.939	0.5	0.706	0.148
1.939	0.8	0.351	0.205
1.987	-0.7	0.497	0.677
1.987	-0.4	0.697	0.281
1.987	-0.1	0.744	0.185
1.987	0.2	1.022	0.141
1.987	0.5	0.379	0.146
1.987	0.8	0.697	0.186
2.035	-0.7	-0.965	0.592
2.035	-0.4	0.693	0.328
2.035	-0.1	0.854	0.194
2.035	0.2	0.419	0.149
2.035	0.5	0.149	0.141
2.035	0.8	0.097	0.228
2.081	-0.7	-0.303	0.579
2.081	-0.4	1.215	0.386
2.081	-0.1	0.319	0.232
2.081	0.2	0.524	0.178
2.081	0.5	0.048	0.148
2.081	0.8	-0.082	0.178
2.126	-0.7	1.157	0.493
2.126	-0.4	1.089	0.417
2.126	-0.1	0.397	0.249
2.126	0.2	0.111	0.213
2.126	0.5	0.159	0.155
2.126	0.8	-0.193	0.164
2.17	-0.7	1.279	0.444
2.17	-0.4	0.7	0.434
2.17	-0.1	0.958	0.284
2.17	0.2	0.235	0.208
2.17	0.5	-0.818	0.182
2.17	0.8	-0.134	0.17
2.212	-0.7	0.047	0.429
2.212	-0.4	0.098	0.471
2.212	-0.1	0.8	0.314
2.212	0.2	0.462	0.219
2.212	0.5	-0.1	0.188
2.212	0.8	-0.041	0.163
2.255	-0.7	0.828	0.649
2.255	-0.4	1.377	0.6
2.255	-0.1	0.783	0.44
2.255	0.2	0.294	0.31
2.255	0.5	-0.526	0.229
2.255	0.8	-0.17	0.245
2.296	-0.7	1.019	0.603
2.296	-0.4	-0.344	0.869
2.296	-0.1	-0.064	0.565
2.296	0.2	-0.227	0.353
2.296	0.5	-0.442	0.257
2.296	0.8	-0.418	0.366
2.338	-0.7	0.922	0.979
2.338	-0.4	0.732	0.951
2.338	-0.1	-1.261	0.881
2.338	0.2	-0.738	0.562
2.338	0.5	-0.308	0.383
2.338	0.8	-0.348	0.341
2.377	-0.7	3.243	1.021
2.377	-0.4	2.293	0.819
2.377	-0.1	1.311	1.325
2.377	0.2	-1.254	0.847
2.377	0.5	-0.869	0.394
2.377	0.8	0.727	0.446
2.416	-0.7	0.072	1.251
2.416	-0.4	2.485	0.89
2.416	-0.1	-2.157	1.191
2.416	0.2	-0.382	0.883
2.416	0.5	-0.207	0.476
2.416	0.8	0.181	0.797
2.454	-0.7	0.999	1.074
2.454	-0.4	1.256	1.224
2.454	-0.1	0.891	1.477
2.454	0.2	-0.899	1.118
2.454	0.5	-1.106	0.504
2.454	0.8	-0.147	0.543