Finite-volume corrections to the CP-odd nucleon matrix elements of the electromagnetic current from the QCD vacuum angle

被引：13

作者：

Akan, Tarik ^{[1
,2
,3
]}

Guo, Feng-Kun ^{[2
,3
]}

Meissner, Ulf-G. ^{[2
,3
,4
,5
,6
]}

机构：

[1] Bozok Univ, Dept Phys, TR-66200 Yozgat, Turkey

[2] Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany

[3] Univ Bonn, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany

[4] Forschungszentrum Julich, Inst Kernphys, Inst Adv Simulat, D-52425 Julich, Germany

[5] Forschungszentrum Julich, JARA FAME, Julich Ctr Hadron Phys, D-52425 Julich, Germany

[6] Forschungszentrum Julich, JARA HPC, D-52425 Julich, Germany

来源：

PHYSICS LETTERS B | 2014年 / 736卷

关键词：

ELECTRIC-DIPOLE MOMENT; NEUTRON EDM; FORM-FACTOR;

D O I：

10.1016/j.physletb.2014.07.022

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Nucleon electric dipole moments originating from strong CP-violation are being calculated by several groups using lattice QCD. We revisit the finite volume corrections to the CP-odd nucleon matrix elements of the electromagnetic current, which can be related to the electric dipole moments in the continuum, in the framework of chiral perturbation theory up to next-to-leading order taking into account the breaking of Lorentz symmetry. Achiral extrapolation of the recent lattice results of both the neutron and proton electric dipole moments is performed, which results in d(n) = (-2.7 +/- 1.2) x 10(-16)e theta(0) cm and d(p) = (2.1 +/- 1.2) x 10(-16)e theta(0) cm. (C) 2014 The Authors. Published by Elsevier B.V.

引用

页码：163 / 168

页数：6

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