A model finding a new Richardson potential with different scales for confinement and asymptotic freedom, by fitting the properties of Δ++ and Ω-

被引：14

作者：

Bagchi, M

Dey, M

Daw, S

Dey, J

机构：

[1] Presidency Coll, Dept Phys, Kolkata 700073, W Bengal, India

[2] Maulana Azad Coll, Dept Phys, Kolkata 700013, W Bengal, India

来源：

NUCLEAR PHYSICS A | 2004年 / 740卷 / 1-2期

关键词：

Hartree-Fock; Richardson potential; magnetic moment; dense matter;

D O I：

10.1016/j.nuclphysa.2004.05.015

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：

Phenomenological Richardson potential has built in asymptotic freedom (AF in short) and confinement, with only one parameter Lambda in the potential. But it is known that the scales of AF and confinement are not the same. In the present work a relativistic mean field calculation for baryons is tried out with two parameters Lambda and Lambda' for AF and confinement, respectively. To test the two parameter potential we calculate the energies and the magnetic moments, of the triple u-quark system (Delta(++)) and the triple s-quark system (Omega(-)) and found good values for Lambda = 100 MeV and Lambda' = 350 MeV. So we believe that the modified Richardson potential should have AF scale A = 100 MeV and the confinement scale Lambda' = 350 MeV. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：109 / 118

页数：10

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