CLAS Physics Database

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Measurement E35M1

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Experiment: e1dvcs run CLAS data, 2011

Spokespersons: H. Avakian

Experiment comment: Beam polarization is 80%.

Publication:

M. Aghasyan, H. Avakian, P. Rossi, E. De Sanctis, D. Hasch, M. Mirazita and CLAS Collaboration Precise measurements of beam spin asymmetries in semi-inclusive π⁰ production // Phys. Letters B 704, 397 (2011)

Quantity measured: A_LU^sin φ_h, dimensionless
Beam-spin asymmetry moment, where φ_h is the azimuthal angle between the leptonic and the hadronic planes.
Beam: e, polarization: polarized
Target: p (Z=1, A=1), polarization: none
Final state: semi-inclusive, polarization: none

Q² :	1.36 — 3.26 GeV²
x_b :	0.16 — 0.436
E_beam :	5.776 GeV

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

Measured data:

P_T, GeV	z, dimensionless	x, dimensionless	Q², GeV2	y, dimensionless	A_LU^sin φ_h, dimensionless	Data errors, dimensionless	Systematic errors, dimensionless
0.138	0.507	0.16	1.36	0.786	0.0081	0.0054	0.0053
0.298	0.517	0.156	1.35	0.797	0.0331	0.0034	0.0016
0.487	0.528	0.156	1.34	0.798	0.0351	0.0043	0.0061
0.675	0.553	0.158	1.36	0.795	0.0306	0.0087	0.0048
0.87	0.513	0.154	1.34	0.8	0.0062	0.021	0.0074
0.134	0.515	0.246	1.97	0.739	0.0097	0.0051	0.0054
0.295	0.521	0.245	1.98	0.747	0.0381	0.0037	0.0033
0.49	0.516	0.245	1.97	0.745	0.0267	0.005	0.0036
0.67	0.517	0.243	1.97	0.752	0.0293	0.0098	0.0076
0.848	0.484	0.233	1.99	0.788	-0.0121	0.0386	0.0165
0.134	0.514	0.342	2.59	0.697	0.0066	0.0075	0.0032
0.294	0.509	0.343	2.55	0.685	0.032	0.0059	0.0017
0.485	0.488	0.341	2.54	0.689	0.0305	0.0081	0.0063
0.656	0.477	0.334	2.66	0.734	0.0236	0.0208	0.0068
0.136	0.491	0.449	3.29	0.676	-0.0068	0.0134	0.0106
0.291	0.478	0.446	3.21	0.661	0.0038	0.0108	0.0063
0.471	0.457	0.436	3.26	0.69	0.0128	0.0189	0.0069