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Experiment: Measurement of ep→e′nπ+ at 1.6<W<2.0 GeV and extraction of nucleon resonance electrocoupling at CLAS, 2014
Spokespersons: K. Park, V.D. Burkert, I.G. Aznauryan
Experiment comment: polarization of electron beam : ~80%
Publication:
Quantity measured: dσ/dΩ, mcbn/rad
Differential cross section.
Beam: e, polarization: polarized
Target: p (Z=1, A=1), polarization: none
Final state: π+n, polarization: none
| Q2 : | 4 GeV2 | |
|---|---|---|
| W : | 1.605 GeV | |
| Ebeam : | 5.499 GeV |
|
Select data slice:
cos(θ) = |
Observable quantity measured (Y axis): dσ/dΩ, mcbn/rad
Parameter (X axis): φ, degree |
Click here to get data in text file, delimited with tabs.
Measured data:
| cos(θ) |
φ,
degree |
dσ/dΩ,
mcbn/rad |
Stat. error,
mcbn/rad |
Syst. error,
mcbn/rad |
|---|---|---|---|---|
| -0.9 | 105 | 0.2577 | 0.0994 | 0.0289 |
| -0.9 | 135 | 0.2066 | 0.0524 | 0.0273 |
| -0.9 | 165 | 0.2303 | 0.0586 | 0.028 |
| -0.9 | 195 | 0.2442 | 0.0664 | 0.0292 |
| -0.9 | 225 | 0.1624 | 0.0505 | 0.0227 |
| -0.7 | 75 | 0.211 | 0.067 | 0.0179 |
| -0.7 | 105 | 0.2581 | 0.0571 | 0.0263 |
| -0.7 | 135 | 0.2292 | 0.0646 | 0.0229 |
| -0.7 | 165 | 0.1464 | 0.0299 | 0.0152 |
| -0.7 | 195 | 0.1464 | 0.0379 | 0.015 |
| -0.7 | 225 | 0.2478 | 0.0637 | 0.0244 |
| -0.7 | 255 | 0.229 | 0.0515 | 0.0233 |
| -0.7 | 285 | 0.1366 | 0.0386 | 0.0115 |
| -0.7 | 315 | 0.2091 | 0.0588 | 0.0081 |
| -0.5 | 45 | 0.2921 | 0.0999 | 0.0035 |
| -0.5 | 75 | 0.2996 | 0.0671 | 0.0147 |
| -0.5 | 105 | 0.24 | 0.0665 | 0.0207 |
| -0.5 | 135 | 0.1469 | 0.0345 | 0.0042 |
| -0.5 | 165 | 0.1681 | 0.0311 | 0.0069 |
| -0.5 | 195 | 0.1961 | 0.0376 | 0.008 |
| -0.5 | 225 | 0.1926 | 0.0383 | 0.0214 |
| -0.5 | 255 | 0.2682 | 0.0624 | 0.0104 |
| -0.5 | 285 | 0.3177 | 0.0838 | 0.0076 |
| -0.3 | 15 | 0.0722 | 0.034 | 0.0022 |
| -0.3 | 45 | 0.1737 | 0.0563 | 0.012 |
| -0.3 | 75 | 0.3637 | 0.1158 | 0.0078 |
| -0.3 | 105 | 0.188 | 0.0428 | 0.0053 |
| -0.3 | 135 | 0.3014 | 0.0644 | 0.0211 |
| -0.3 | 165 | 0.2595 | 0.0523 | 0.0077 |
| -0.3 | 195 | 0.2348 | 0.0451 | 0.0061 |
| -0.3 | 225 | 0.1786 | 0.0447 | 0.0066 |
| -0.3 | 255 | 0.2593 | 0.0611 | 0.0226 |
| -0.3 | 285 | 0.1756 | 0.051 | 0.0038 |
| -0.1 | 45 | 0.2063 | 0.0813 | 0.009 |
| -0.1 | 75 | 0.2581 | 0.0725 | 0.007 |
| -0.1 | 105 | 0.1482 | 0.0374 | 0.0055 |
| -0.1 | 135 | 0.2223 | 0.0395 | 0.0139 |
| -0.1 | 165 | 0.1861 | 0.0343 | 0.0128 |
| -0.1 | 195 | 0.2391 | 0.0404 | 0.0156 |
| -0.1 | 225 | 0.2089 | 0.0399 | 0.0157 |
| -0.1 | 255 | 0.2283 | 0.0483 | 0.0094 |
| -0.1 | 285 | 0.2363 | 0.0709 | 0.0059 |
| -0.1 | 315 | 0.0397 | 0.0151 | 0.0013 |
| 0.1 | 45 | 0.1924 | 0.0555 | 0.0023 |
| 0.1 | 75 | 0.1733 | 0.0416 | 0.0063 |
| 0.1 | 105 | 0.2334 | 0.0591 | 0.0064 |
| 0.1 | 135 | 0.1141 | 0.0282 | 0.0074 |
| 0.1 | 165 | 0.1046 | 0.0213 | 0.0078 |
| 0.1 | 195 | 0.1029 | 0.0208 | 0.0065 |
| 0.1 | 225 | 0.1456 | 0.0465 | 0.0069 |
| 0.1 | 255 | 0.1859 | 0.0645 | 0.0059 |
| 0.1 | 285 | 0.1869 | 0.0637 | 0.0027 |
| 0.1 | 315 | 0.057 | 0.0191 | 0.0047 |
| 0.3 | 45 | 0.189 | 0.042 | 0.001 |
| 0.3 | 75 | 0.2453 | 0.0472 | 0.003 |
| 0.3 | 105 | 0.1541 | 0.0343 | 0.0066 |
| 0.3 | 135 | 0.217 | 0.045 | 0.0081 |
| 0.3 | 165 | 0.1114 | 0.0192 | 0.0011 |
| 0.3 | 195 | 0.1616 | 0.0301 | 0.0016 |
| 0.3 | 225 | 0.1712 | 0.0392 | 0.0181 |
| 0.3 | 255 | 0.1842 | 0.0704 | 0.0066 |
| 0.3 | 285 | 0.1618 | 0.0419 | 0.0062 |
| 0.3 | 315 | 0.1716 | 0.0429 | 0.0018 |
| 0.5 | 15 | 0.1142 | 0.0369 | 0.0025 |
| 0.5 | 45 | 0.2575 | 0.0868 | 0.0092 |
| 0.5 | 75 | 0.2118 | 0.0477 | 0.0032 |
| 0.5 | 105 | 0.2488 | 0.0687 | 0.0184 |
| 0.5 | 135 | 0.2167 | 0.056 | 0.009 |
| 0.5 | 165 | 0.1805 | 0.0414 | 0.0057 |
| 0.5 | 195 | 0.1211 | 0.0261 | 0.0037 |
| 0.5 | 225 | 0.1761 | 0.0599 | 0.0123 |
| 0.5 | 255 | 0.1591 | 0.0476 | 0.0045 |
| 0.5 | 285 | 0.3056 | 0.0976 | 0.0044 |
| 0.5 | 315 | 0.3015 | 0.1514 | 0.0295 |
| 0.7 | 15 | 0.1699 | 0.0379 | 0.0088 |
| 0.7 | 45 | 0.184 | 0.0436 | 0.0136 |
| 0.7 | 75 | 0.3102 | 0.0751 | 0.0102 |
| 0.7 | 105 | 0.282 | 0.0719 | 0.0184 |
| 0.7 | 135 | 0.236 | 0.0521 | 0.0103 |
| 0.7 | 165 | 0.1911 | 0.0415 | 0.0096 |
| 0.7 | 195 | 0.2172 | 0.0531 | 0.0148 |
| 0.7 | 225 | 0.171 | 0.042 | 0.0102 |
| 0.7 | 255 | 0.285 | 0.0639 | 0.0166 |
| 0.7 | 285 | 0.1549 | 0.0365 | 0.0091 |
| 0.7 | 315 | 0.1694 | 0.047 | 0.0191 |
| 0.7 | 345 | 0.2573 | 0.0629 | 0.0078 |
| 0.9 | 15 | 0.1874 | 0.0321 | 0.005 |
| 0.9 | 45 | 0.168 | 0.035 | 0.0097 |
| 0.9 | 75 | 0.1428 | 0.0309 | 0.0074 |
| 0.9 | 105 | 0.1491 | 0.0295 | 0.0073 |
| 0.9 | 135 | 0.1273 | 0.0252 | 0.0062 |
| 0.9 | 165 | 0.1572 | 0.0309 | 0.014 |
| 0.9 | 195 | 0.1515 | 0.0269 | 0.0091 |
| 0.9 | 225 | 0.1608 | 0.0298 | 0.006 |
| 0.9 | 255 | 0.1334 | 0.0263 | 0.0039 |
| 0.9 | 285 | 0.1583 | 0.0306 | 0.0082 |
| 0.9 | 315 | 0.174 | 0.0344 | 0.0175 |
| 0.9 | 345 | 0.1715 | 0.0296 | 0.0067 |