Polarization transfer and spin response functions in quasielastic [Formula Presented] reactions at 346 MeV

Tomotsugu Wakasa, H. Sakai, K. Hatanaka, H. Okamura, H. Otsu, S. Fujita, T. Nonaka, T. Uesaka, Y. Satou, T. Ohnishi, G. Yokoyama, S. Ishida, N. Sakamoto, M. B. Greenfield, M. Ichimura, K. Kawahigashi

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Abstract

A complete set of polarization transfer coefficients has been measured for quasielastic [Formula Presented] reactions on [Formula Presented] [Formula Presented] and [Formula Presented] at a bombarding energy of 346 MeV and a laboratory scattering angle of [Formula Presented] The spin-longitudinal [Formula Presented] and spin-transverse [Formula Presented] response functions are extracted within a framework of a plane-wave impulse approximation with eikonal and optimal factorization approximations. The theoretically expected enhancement of [Formula Presented] is not observed. The observed [Formula Presented] is consistent with the pionic enhanced [Formula Presented] expected by random-phase approximation (RPA) calculations. On the contrary, a large excess of the observed [Formula Presented] is found in comparison with [Formula Presented] of the quasielastic electron scattering as well as of RPA calculations. This excess masks the effect of pionic correlations in [Formula Presented] The theoretical calculations are performed in a distorted-wave impulse approximation with RPA correlations, which indicates that the nuclear absorption effect depends on the spin direction. This spin-direction dependence is responsible in part for the excess of [Formula Presented]

Original languageEnglish
Pages (from-to)3177-3195
Number of pages19
JournalPhysical Review C - Nuclear Physics
Volume59
Issue number6
DOIs
Publication statusPublished - Jan 1 1999
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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