CLAS Physics Database

Measurement E151M2590

Experiment: EG4
Year: 2016

Experiment comment:

Final asymmetry results for the ep-> e pi+ (n) channel extracted from CLAS/EG4 data obtained using a longitudinally polarized beam and a longitudinally polarized NH3 target (CAA HS07-02).
Spokesperson: Xiaochao Zheng
Reaction: ep → π+n
Polarization: beam (longitudinal), target (longitudinal)
Quantity: ALU
εL: 0.0141
Q2: 0.0071 GeV2
W: 1415.0 GeV
Ebeam: 1.0539 GeV
ε: 0.7202

Slice: cos(θπ+) =

Measurement data
cos(θπ+) φ(π+), [deg] ALU uncertainty
0.35 42.0 -0.2501 0.235
0.35 54.0 -0.3225 0.2466
0.45 42.0 0.0821 0.2275
0.45 54.0 -0.2593 0.163
0.45 222.0 0.3392 0.2185
0.45 234.0 -0.3356 0.2152
0.55 18.0 -0.1253 0.2498
0.55 30.0 -0.1847 0.2332
0.55 42.0 -0.5805 0.1812
0.55 54.0 0.0329 0.2115
0.55 222.0 0.2621 0.2092
0.55 234.0 -0.2093 0.198
0.55 246.0 0.1809 0.238
0.65 42.0 -0.111 0.2562
0.65 54.0 0.1357 0.2051
0.65 150.0 0.1836 0.2628
0.65 174.0 0.0169 0.2561
0.65 222.0 -0.1083 0.1923
0.65 234.0 0.1936 0.1633
0.65 246.0 -0.1127 0.2259
0.75 222.0 -0.0737 0.2547
0.75 234.0 0.0862 0.203
0.75 246.0 0.1517 0.1823
0.85 210.0 -0.4276 0.2424
0.85 222.0 0.2611 0.2023
0.85 234.0 0.0875 0.241
0.85 246.0 -0.0179 0.191