Scalar and vector form factors of the in-medium nucleon

Details Scalar and vector form factors of the in-medium nucleon Scalar and vector form factors of the in-medium nucleon

2003-07-12

arxiv.org/abs/nucl-th/0307053v2

Phys.Lett. B575 (2003) 4-10

Physics

Nuclear Physics

Nuclear Theory

13 pages, 2 figures, references are up dated

Scientific paper

10.1016/j.physletb.2003.09.055

Using the quark-meson coupling model, we calculate the form factors at sigma- and omega-nucleon strong-interaction vertices in nuclear matter. The Peierls-Yoccoz projection technique is used to take account of center of mass and recoil corrections. We also apply the Lorentz contraction to the internal quark wave function. The form factors are reduced by the nuclear medium relative to those in vacuum. At normal nuclear matter density and Q^2 = 1 GeV^2, the reduction rate in the scalar form factor is about 15%, which is almost identical to that in the vector one. We parameterize the ratios of the form factors in symmetric nuclear matter to those in vacuum as a function of nuclear density and momentum transfer.

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