CLAS Physics Database

Measurement E151M2986

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: 0.5316
Q2: 0.2445 GeV2
W: 1355.0 GeV
Ebeam: 1.9889 GeV
ε: 0.8892

Slice: cos(θπ+) =

Measurement data
cos(θπ+) φ(π+), [deg] ALU uncertainty
0.35 66.0 -0.3324 0.1995
0.55 270.0 -0.2878 0.2701
0.65 102.0 0.1491 0.2339
0.65 270.0 0.1587 0.2522
0.75 78.0 -0.4659 0.2419
0.75 90.0 0.0615 0.2234
0.75 102.0 0.2337 0.1862
0.75 114.0 -0.0501 0.2506
0.75 234.0 0.0326 0.2749
0.75 246.0 0.2111 0.2467
0.75 258.0 0.0005 0.2194
0.75 270.0 -0.2006 0.207
0.75 282.0 -0.2188 0.2246
0.75 294.0 -0.2521 0.2287
0.85 90.0 0.1096 0.1837
0.85 102.0 -0.136 0.1796
0.85 114.0 0.1661 0.2145
0.85 126.0 -0.1831 0.2596
0.85 138.0 0.1271 0.2443
0.85 222.0 -0.0714 0.2623
0.85 234.0 0.0604 0.2284
0.85 246.0 -0.1673 0.2053
0.85 258.0 -0.341 0.2196
0.85 270.0 -0.0181 0.2499
0.85 282.0 -0.3549 0.1816
0.85 294.0 -0.0601 0.1922
0.85 306.0 -0.358 0.2596
0.95 102.0 0.2957 0.263
0.95 114.0 -0.1725 0.2519
0.95 126.0 0.0738 0.2431
0.95 246.0 0.1768 0.2565
0.95 258.0 0.0197 0.1943
0.95 270.0 -0.5311 0.2282
0.95 282.0 -0.0155 0.2245
0.95 294.0 0.3204 0.2517