E-89-039
- Spokespersons
- S. Dytman, K. Giovanetti
- Year
- 2007
- Abstract
- New cross sections for the reaction ep to e eta p are reported for total center of mass energy W=1.5-2.3 GeV and invariant squared momentum transfer Q2=0.13-3.3 GeV2. This large kinematic range allows extraction of important new information about response functions, photocouplings, and eta-N coupling strengths of baryon resonances. A sharp structure is seen at W ~ 1.7 GeV. The shape of the differential cross section is indicative of the presence of a P-wave resonance which persists to high Q2. Improved values are derived for the photon coupling amplitude for the S11(1535) resonance. This is the first consistent interpretation over a large range of Q2.
- Publication
-
- H. Denizli, J. Mueller, S. Dytman, M.L. Leber, R.D. Levine, J. Miles, K.Y. Kim, and CLAS Collaboration Q2 dependence of the S11(1535) Photocoupling and Evidence for a P-wave resonance in η electroproduction //
- Quantities
- σ dσ/dΩ AsymTT dσ/dΩT+ε·dσ/dΩL AsymLT
Measurements
ID | Quantity | Beam | Target | Final state |
Q2min, GeV2 |
Q2max, GeV2 |
Wmin, GeV |
Wmax, GeV |
---|---|---|---|---|---|---|---|---|
E102M101 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 0.2 | 0.4 | 1.55 | 1.57 |
E102M102 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 0.2 | 0.4 | 1.57 | 1.59 |
E102M103 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 0.2 | 0.4 | 1.59 | 1.61 |
E102M104 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 0.6 | 1.0 | 1.49 | 1.51 |
E102M105 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 0.6 | 1.0 | 1.51 | 1.53 |
E102M106 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 0.6 | 1.0 | 1.53 | 1.55 |
E102M107 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 0.6 | 1.0 | 1.55 | 1.57 |
E102M108 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 0.6 | 1.0 | 1.57 | 1.59 |
E102M109 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 0.6 | 1.0 | 1.59 | 1.61 |
E102M110 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 0.6 | 1.0 | 1.61 | 1.63 |
E102M111 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 0.6 | 1.0 | 1.63 | 1.65 |
E102M112 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 0.6 | 1.0 | 1.65 | 1.67 |
E102M113 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 0.6 | 1.0 | 1.67 | 1.69 |
E102M114 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 0.6 | 1.0 | 1.69 | 1.71 |
E102M115 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 0.6 | 1.0 | 1.71 | 1.73 |
E102M116 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 0.6 | 1.0 | 1.73 | 1.75 |
E102M117 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 0.6 | 1.0 | 1.75 | 1.77 |
E102M118 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 0.6 | 1.0 | 1.77 | 1.79 |
E102M119 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 0.6 | 1.0 | 1.79 | 1.81 |
E102M120 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.0 | 1.4 | 1.49 | 1.51 |
E102M121 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.0 | 1.4 | 1.51 | 1.53 |
E102M122 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.0 | 1.4 | 1.53 | 1.55 |
E102M123 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.0 | 1.4 | 1.55 | 1.57 |
E102M124 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.0 | 1.4 | 1.57 | 1.59 |
E102M125 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.0 | 1.4 | 1.59 | 1.61 |
E102M126 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.0 | 1.4 | 1.61 | 1.63 |
E102M127 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.0 | 1.4 | 1.63 | 1.65 |
E102M128 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.0 | 1.4 | 1.65 | 1.67 |
E102M129 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.0 | 1.4 | 1.65 | 1.69 |
E102M130 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.0 | 1.4 | 1.67 | 1.71 |
E102M131 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.0 | 1.4 | 1.69 | 1.73 |
E102M132 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.0 | 1.4 | 1.71 | 1.75 |
E102M133 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.3 | 2.1 | 1.49 | 1.51 |
E102M134 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.3 | 2.1 | 1.51 | 1.53 |
E102M135 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.3 | 2.1 | 1.53 | 1.55 |
E102M136 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.3 | 2.1 | 1.55 | 1.57 |
E102M137 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.3 | 2.1 | 1.57 | 1.59 |
E102M138 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.3 | 2.1 | 1.59 | 1.61 |
E102M139 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.3 | 2.1 | 1.61 | 1.63 |
E102M140 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.3 | 2.1 | 1.63 | 1.65 |
E102M141 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.3 | 2.1 | 1.65 | 1.67 |
E102M142 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.3 | 2.1 | 1.67 | 1.69 |
E102M143 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.3 | 2.1 | 1.69 | 1.71 |
E102M144 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.3 | 2.1 | 1.71 | 1.73 |
E102M145 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.3 | 2.1 | 1.73 | 1.75 |
E102M146 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.3 | 2.1 | 1.75 | 1.77 |
E102M147 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.3 | 2.1 | 1.77 | 1.79 |
E102M148 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.3 | 2.1 | 1.79 | 1.81 |
E102M149 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.3 | 2.1 | 1.81 | 1.83 |
E102M150 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.3 | 2.1 | 1.83 | 1.85 |
E102M151 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.3 | 2.1 | 1.85 | 1.87 |
E102M152 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.3 | 2.1 | 1.87 | 1.89 |
E102M153 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.3 | 2.1 | 1.89 | 1.91 |
E102M154 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.3 | 2.1 | 1.91 | 1.93 |
E102M155 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.3 | 2.1 | 1.93 | 1.95 |
E102M156 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.3 | 2.1 | 1.95 | 1.97 |
E102M157 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.3 | 2.1 | 1.97 | 1.99 |
E102M158 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 1.3 | 2.1 | 1.99 | 2.01 |
E102M159 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 2.1 | 2.9 | 1.49 | 1.51 |
E102M160 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 2.1 | 2.9 | 1.51 | 1.53 |
E102M161 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 2.1 | 2.9 | 1.53 | 1.55 |
E102M162 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 2.1 | 2.9 | 1.55 | 1.57 |
E102M163 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 2.1 | 2.9 | 1.57 | 1.59 |
E102M164 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 2.1 | 2.9 | 1.59 | 1.61 |
E102M165 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 2.1 | 2.9 | 1.61 | 1.63 |
E102M166 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 2.1 | 2.9 | 1.63 | 1.65 |
E102M167 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 2.1 | 2.9 | 1.65 | 1.67 |
E102M168 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 2.1 | 2.9 | 1.65 | 1.69 |
E102M169 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 2.1 | 2.9 | 1.67 | 1.71 |
E102M170 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 2.1 | 2.9 | 1.69 | 1.73 |
E102M171 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 2.1 | 2.9 | 1.71 | 1.75 |
E102M172 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 2.1 | 2.9 | 1.73 | 1.77 |
E102M173 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 2.1 | 2.9 | 1.75 | 1.79 |
E102M174 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 2.1 | 2.9 | 1.77 | 1.81 |
E102M175 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 2.1 | 2.9 | 1.79 | 1.83 |
E102M176 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 2.1 | 2.9 | 1.81 | 1.85 |
E102M177 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 2.1 | 2.9 | 1.83 | 1.87 |
E102M178 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 2.1 | 2.9 | 1.85 | 1.89 |
E102M179 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 2.1 | 2.9 | 1.87 | 1.91 |
E102M180 | dσ/dΩT+ε·dσ/dΩL | e | p | η p | 2.1 | 2.9 | 1.89 | 1.93 |
E102M181 | AsymLT | e | p | η p | 0.2 | 0.4 | 1.49 | 1.51 |
E102M182 | AsymLT | e | p | η p | 0.2 | 0.4 | 1.51 | 1.53 |
E102M183 | AsymLT | e | p | η p | 0.2 | 0.4 | 1.53 | 1.55 |
E102M184 | AsymLT | e | p | η p | 0.2 | 0.4 | 1.55 | 1.57 |
E102M185 | AsymLT | e | p | η p | 0.2 | 0.4 | 1.57 | 1.59 |
E102M186 | AsymLT | e | p | η p | 0.2 | 0.4 | 1.59 | 1.61 |
E102M187 | AsymLT | e | p | η p | 0.6 | 1.0 | 1.49 | 1.51 |
E102M188 | AsymLT | e | p | η p | 0.6 | 1.0 | 1.51 | 1.53 |
E102M189 | AsymLT | e | p | η p | 0.6 | 1.0 | 1.53 | 1.55 |
E102M190 | AsymLT | e | p | η p | 0.6 | 1.0 | 1.55 | 1.57 |
E102M191 | AsymLT | e | p | η p | 0.6 | 1.0 | 1.57 | 1.59 |
E102M192 | AsymLT | e | p | η p | 0.6 | 1.0 | 1.59 | 1.61 |
E102M193 | AsymLT | e | p | η p | 0.6 | 1.0 | 1.61 | 1.63 |
E102M194 | AsymLT | e | p | η p | 0.6 | 1.0 | 1.63 | 1.65 |
E102M195 | AsymLT | e | p | η p | 0.6 | 1.0 | 1.65 | 1.67 |
E102M196 | AsymLT | e | p | η p | 0.6 | 1.0 | 1.67 | 1.69 |
E102M197 | AsymLT | e | p | η p | 0.6 | 1.0 | 1.69 | 1.71 |
E102M198 | AsymLT | e | p | η p | 0.6 | 1.0 | 1.71 | 1.73 |
E102M199 | AsymLT | e | p | η p | 0.6 | 1.0 | 1.73 | 1.75 |
E102M200 | AsymLT | e | p | η p | 0.6 | 1.0 | 1.75 | 1.77 |