CLAS Physics Database

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Measurement E154M2

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Experiment: eg1-dvcs, 2009

Spokespersons: A. Kim

Measurement comment: Target and double spin asymmetries

Publication:

A. Kim et al. (CLAS Collaboration) Target and Double Spin Asymmetries of Deeply Virtual π0 Production with a Longitudinally Polarized Proton Target and CLAS // arXiv:1511.03338, submitted to Phys. Lett. B (2016)

Quantity measured: A_UL,
Target spin asymmetry.
Beam: e, polarization: polarized
Target: p (Z=1, A=1), polarization: longitudinal
Final state: π⁰p, polarization: none

Q² :	2.83 GeV²
x_b :	0.4

Select data slice:
-t = (GeV/c)^2

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

Parameter (X axis): φ, deg

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Measured data:

-t, (GeV/c)^2	φ, deg	A_UL	Data errors
0.27	25	0.035	0.063
0.27	59	0.161	0.075
0.27	90	0.073	0.094
0.27	118	0.237	0.106
0.27	146	-0.103	0.169
0.27	179	0.065	0.323
0.27	208	-0.269	0.187
0.27	242	-0.142	0.125
0.27	270	-0.123	0.118
0.27	302	-0.114	0.083
0.27	337	-0.097	0.064
0.52	25	0.112	0.043
0.52	58	0.157	0.051
0.52	89	0.089	0.08
0.52	122	0.152	0.065
0.52	147	0.234	0.079
0.52	177	0.067	0.105
0.52	209	-0.271	0.085
0.52	241	-0.101	0.101
0.52	271	-0.165	0.083
0.52	301	-0.171	0.057
0.52	335	-0.042	0.041
0.88	28	0.019	0.051
0.88	57	0.114	0.055
0.88	88	0.515	0.134
0.88	123	0.103	0.075
0.88	147	0.166	0.081
0.88	176	0.168	0.108
0.88	211	-0.156	0.085
0.88	241	0.11	0.143
0.88	270	-0.038	0.09
0.88	302	-0.047	0.064
0.88	333	0.006	0.047
1.24	31	0.178	0.084
1.24	59	0.141	0.089
1.24	88	0.011	0.122
1.24	123	0.198	0.139
1.24	146	0.288	0.126
1.24	178	0.164	0.191
1.24	210	-0.161	0.129
1.24	243	-0.387	0.128
1.24	268	0.031	0.107
1.24	303	-0.057	0.1
1.24	330	0.124	0.074
1.59	29	0.036	0.094
1.59	58	0.123	0.112
1.59	90	0.229	0.11
1.59	122	0.256	0.136
1.59	146	0.311	0.175
1.59	176	0.185	0.211
1.59	213	-0.554	0.194
1.59	243	-0.264	0.112
1.59	268	-0.166	0.093
1.59	303	-0.124	0.125
1.59	331	0.103	0.09