CLAS Physics Database

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Measurement E127M1

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Experiment: E5, 2000

Spokespersons: W. K. Brooks and M. F. Vineyard

Experiment comment: Data analysis done by J.D. Lachniet, a student at CMU. The results here are the TOF and EC systems neutron detection efficiency (NDE).

Publication:

J.Lachniet, A.Afanasev, H.Arenh?vel, W.K.Brooks, G.P.Gilfoyle, S.Jeschonnek, B.Quinn, M.F.Vineyard, et al (the CLAS Collaboration) A Precise Measurement of the Neutron Magnetic Form Factor GMn in the Few-GeV2 Region // PRL 102, 192001 (2009)

Quantity measured: GMn_NDE, SC NDE, 4.2 GeV
Neutron Detection Efficiency of the E5 GMn measurement extracted from the p(e,e′pi+)n reaction.
Beam: e, polarization: polarized
Target: p (Z=1, A=1), polarization: none
Final state: π⁺n, polarization: none

Q² :	1.13636 — 4.77273 GeV²
W :	0 — 1.095445115 GeV

Observable quantity measured (Y axis): GMn_NDE, SC NDE, 4.2 GeV
Plot measurement data

Parameter (X axis): P_n, GeV/c

Click here to get data in text file, delimited with tabs.

Measured data:

P_n, GeV/c	GMn_NDE, SC NDE, 4.2 GeV	Stat. error, SC NDE, 4.2 GeV
0.225	0.0062016	0.0030912
0.425	0.0311735	0.0022202
0.6	0.0410676	0.0018812
0.75	0.0435081	0.0014832
0.875	0.0436156	0.0015071
0.975	0.0462563	0.0014236
1.075	0.0519635	0.0014203
1.175	0.0555071	0.0014104
1.275	0.0606993	0.0014625
1.375	0.0648541	0.0015572
1.475	0.0664635	0.0016676
1.575	0.0701209	0.0018235
1.675	0.0736886	0.0020206
1.775	0.074578	0.0022172
1.875	0.0786961	0.0024972
1.975	0.0756696	0.002669
2.095	0.0798526	0.0026351
2.235	0.0865422	0.0031907
2.375	0.0890562	0.0038596
2.515	0.0826166	0.0044444
2.655	0.075559	0.0051892
2.795	0.0844119	0.0065949
2.965	0.0875912	0.0072823
3.265	0.0923361	0.008797
3.665	0.0434783	0.016072
4.065	0.285714	0.170747