Localized form of Fock terms in nuclear covariant density functional theory
Localized form of Fock terms in nuclear covariant density functional theory
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DOI：
10.1103/physrevc.86.021302
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发表时间：
2012-07
影响因子：
3.1
通讯作者：
H. Liang;P. Zhao;P. Ring;X. Roca-Maza;J. Meng
中科院分区：
文献类型：
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作者：
H. Liang;P. Zhao;P. Ring;X. Roca-Maza;J. Meng
（2012年6月1日接收; 2012年7月2日收到修订稿; 2012年8月6日出版）在大多数核协变密度泛函理论的成功版本中，Fock项没有被明确包含，这导致了局域泛函，并形成了它们目前广泛应用的基础。然而，它有严重的后果的描述Gamow-Teller共振（GTR）和自旋偶极共振（SDR），只能通过添加进一步的唯象参数治愈。相对论Hartree-Fock模型没有这些问题。它们可以成功地描述GTR和SDR以及Dirac有效质量的等矢量部分，而无需任何额外的参数。然而，它们是非局部的，需要相当大的数值努力。通过零程约化和Fierz变换，提出了一种在局域泛函中考虑Fock项的新方法，该方法保留了传统模型的简单性，并对自旋-同位旋通道和Dirac质量提供了正确的描述.DOI：10.1103/PhysRevC.86.021302 PACS编号：21
(Received 1 June 2012; revised manuscript received 2 July 2012; published 6 August 2012)In most of the successful versions of covariant density functional theory in nuclei, the Fock terms are notincluded explicitly, which leads to local functionals and forms the basis of their widespread applicability atpresent. However, it has serious consequences for the description of Gamow-Teller resonances (GTR) and spin-dipole resonances (SDR) which can only be cured by adding further phenomenological parameters. RelativisticHartree-Fock models do not suffer from these problems. They can successfully describe the GTR and SDRas well as the isovector part of the Dirac effective mass without any additional parameters. However, they arenonlocal and require considerable numerical effort. By the zero-range reduction and the Fierz transformation,a new method is proposed to take into account the Fock terms in local functionals, which retains the simplicityof conventional models and provides proper descriptions of the spin-isospin channels and the Dirac masses.DOI: 10.1103/PhysRevC.86.021302 PACS number(s): 21