CLAS Physics Database

Measurement E151M3127

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: 0.0227
Q2: 0.0291 GeV2
W: 1655.0 GeV
Ebeam: 1.9889 GeV
ε: 0.7891

Slice: cos(θπ+) =

Measurement data
cos(θπ+) φ(π+), [deg] ALU uncertainty
0.35 78.0 0.255 0.228
0.35 282.0 -0.2346 0.2691
0.45 18.0 -0.0432 0.2828
0.45 258.0 -0.2874 0.221
0.45 270.0 -0.4416 0.2195
0.45 282.0 -0.0484 0.2748
0.55 78.0 0.2896 0.255
0.55 126.0 -0.1895 0.2232
0.55 210.0 0.4773 0.2318
0.55 258.0 -0.1907 0.2631
0.55 270.0 0.1282 0.2306
0.55 282.0 0.1921 0.2633
0.65 126.0 -0.4355 0.2319
0.65 138.0 -0.0492 0.2543
0.65 150.0 -0.634 0.2199
0.65 210.0 0.133 0.2613
0.65 222.0 0.2319 0.2565
0.65 294.0 0.3987 0.2444
0.75 66.0 0.6252 0.1927
0.75 126.0 0.021 0.264
0.75 210.0 -0.2658 0.2568
0.75 222.0 0.028 0.233
0.75 234.0 0.1366 0.237
0.75 258.0 -0.1814 0.2456
0.75 270.0 -0.0674 0.2009
0.75 282.0 0.27 0.2417
0.85 114.0 0.3978 0.2069
0.85 126.0 -0.1332 0.2187
0.85 198.0 0.0755 0.2845
0.85 210.0 -0.2658 0.205
0.85 222.0 0.1365 0.2436
0.85 234.0 0.1528 0.2596
0.85 258.0 0.2931 0.2607