CLAS Physics Database

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Measurement E82M1

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Experiment: E91-023 CLAS experiment, 1998

Spokespersons: R. Fatemi

Measurement comment: The measured photon asymmetry (A1+ETA*A2) for the Q**2 region 0.15 to 0.22 GeV**2 obtained with a beam energy of 2.6 GeV.

Publication:

R. Fatemi, A.V. Skabelin, V. D. Burkert, D. Crabb, R. DeVita, S. E. Kuhn, R. Minehart and CLAS Collaboration Measurement of the Spin Structure Functions in the Resonance Region for Q² from 0.15 to 1.6 GeV² // PRL 91 (2003) 222002

Quantity measured: A₁+ηA₂, dimensionless
Virtual photon asymmetry.
Beam: e, polarization: none
Target: p (Z=1, A=1), polarization: none
Final state: inclusive, polarization: none

Q² :	0.15 — 0.22 GeV²
W :	1.1 — 2.02 GeV
x_b :	0
E_beam :	2.6 GeV

Observable quantity measured (Y axis): A₁+ηA₂, dimensionless
Plot measurement data

Parameter (X axis): W, GeV

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

Measured data:

W, GeV	A₁+ηA₂, dimensionless	Stat. error, dimensionless
1.1	-0.636425	0.2488105
1.14	-0.5738366	0.2480233
1.18	-0.424861	0.1338218
1.26	-0.4104419	0.1044967
1.22	-0.4385285	0.1059728
1.26	-0.1067598	0.114071
1.3	-0.05651112	0.1262664
1.34	0.04135435	0.1075965
1.38	-0.07906306	0.1075389
1.42	0.007468469	0.08753687
1.46	0.003754059	0.0666566
1.5	0.01639453	0.06640349
1.54	0.01709433	0.0665958
1.58	0.02524298	0.06760236
1.62	0.02129971	0.05996184
1.66	-0.003676819	0.05478958
1.7	-0.01709835	0.05840805
1.74	0.0240343	0.05526209
1.78	0.06193202	0.05466131
1.82	-0.03451247	0.0512488
1.86	-0.02516174	0.05434954
1.9	-0.03242375	0.05442525
1.94	-0.03529964	0.06131104
1.98	-0.01774363	0.04349385
2.02	0.1015765	0.04302257