Measurement of the interference structure functionRLTfor the12C(e,e′p)reaction in the quasielastic region

Autor: V. Bhushan, D. S. Dale, S. Dolfini, Joseph B. Mandeville, T. McIlvain, D. J. Margaziotis, William Bertozzi, D. Martinez, Glen A. Warren, J. Görgen, W. W. Sapp, D. R. Tieger, G. W. Dodson, D. Jordan, Shalev Gilad, K. A. Dow, M. Holtrop, M. B. Epstein, Jiahao Chen, W. Turchinetz, J. Kelsey, J. Dzengeleski, W. Boeglin, C. Tschalaer, A. J. Sarty, Costas N. Papanicolas, K. Joo, Ricardo Alarcon, R. M. Laszewski, W. Kim, M. Farkhondeh, R. Beck, R.W. Lourie, Larry Weinstein, S. Penn, R. A. Miskimen, S. E. Williamson
Rok vydání: 1998
Předmět:
Zdroj: Physical Review C. 58:3205-3211
ISSN: 1089-490X
0556-2813
Popis: The coincidence cross section and the interference structure function, ${R}_{\mathrm{LT}},$ were measured for the ${}^{12}\mathrm{C}{(e,e}^{\ensuremath{'}}p){}^{11}\mathrm{B}$ reaction at quasielastic kinematics and central momentum transfer of $|\stackrel{\ensuremath{\rightarrow}}{q}|=400\mathrm{M}\mathrm{e}\mathrm{V}/\mathrm{c}.$ The measurement was at an opening angle of ${\ensuremath{\theta}}_{\mathrm{pq}}=11\ifmmode^\circ\else\textdegree\fi{},$ covering a range in missing energy of ${E}_{m}=0$ to 65 MeV. The ${R}_{\mathrm{LT}}$ structure function is found to be consistent with zero for ${E}_{m}g50\mathrm{MeV},$ confirming an earlier study which indicated that ${R}_{L}$ vanishes in this region. The integrated strengths of the $p$- and $s$-shell are compared with a distorted wave impulse approximation (DWIA) calculation. The $s$-shell strength and shape are also compared with a Hartree Fock--random phase approximation (HF-RPA) calculation. The DWIA calculation does not succeed in giving a consistent description of both the cross section data and the extracted ${R}_{\mathrm{LT}}$ response for either shell. The HF-RPA calculation describes the data more consistently, which may be due to the inclusion of 2-body currents in this calculation.
Databáze: OpenAIRE
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