CLAS Physics Database

Measurement E151M664

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: AUL
εL: 0.1577
Q2: 0.205 GeV2
W: 1595.0 GeV
Ebeam: 1.9889 GeV
ε: 0.7628

Slice: cos(θπ+) =

Measurement data
cos(θπ+) φ(π+), [deg] AUL uncertainty
0.65 114.0 0.3804 0.8591
0.65 222.0 0.3669 0.8268
0.75 114.0 -0.0813 0.7223
0.75 138.0 -0.6674 0.7453
0.75 210.0 -0.0403 0.7927
0.75 222.0 1.2148 0.8431
0.75 234.0 1.0548 0.8675
0.75 246.0 1.3455 0.8077
0.85 78.0 -0.15 0.8342
0.85 222.0 -0.3029 0.6857
0.85 234.0 -0.4189 0.6398
0.85 246.0 1.0869 0.8306
0.85 258.0 0.1477 0.7922
0.95 246.0 0.2218 0.6712
0.95 258.0 -0.048 0.642
0.95 270.0 0.3537 0.6596