Octet baryon electromagnetic form factors in nuclear medium

被引：49
|
作者：
Ramalho, G. [1 ]
Tsushima, K. [2 ]
Thomas, A. W. [2 ,3 ]
机构：
[1] Univ Tecn Lisboa, Inst Super Tecn, CFTP, P-1049001 Lisbon, Portugal
[2] Univ Adelaide, Sch Chem & Phys, CSSM, Adelaide, SA 5005, Australia
[3] Univ Adelaide, Sch Chem & Phys, CoEPP, Adelaide, SA 5005, Australia
来源：
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 2013年 / 40卷 / 01期
基金：
澳大利亚研究理事会;
关键词：
MESON COUPLING MODEL; CLOUDY BAG MODEL; MAGNETIC-MOMENTS; QUARK-MODEL; LAMBDA(B) HYPERNUCLEI; POLARIZATION TRANSFER; BOTTOM HADRONS; FINITE NUCLEI; PION CLOUD; NEUTRON;
D O I：
10.1088/0954-3899/40/1/015102
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
We study the octet baryon electromagnetic form factors in nuclear matter using the covariant spectator quark model extended to the nuclear matter regime. The parameters of the model in vacuum are fixed by the study of the octet baryon electromagnetic form factors. In nuclear matter the changes in hadron properties are calculated by including the relevant hadron masses and the modification of the pion-baryon coupling constants calculated in the quark-meson coupling model. In nuclear matter the magnetic form factors of the octet baryons are enhanced in the low Q(2) region, while the electric form factors show a more rapid variation with Q(2). The results are compared with the modification of the bound proton electromagnetic form factors observed at Jefferson Lab. In addition, the corresponding changes for the bound neutron are predicted.
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页数：36
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