Disconnected quark loop contributions to nucleon observables in lattice QCD

被引：61

作者：

Abdel-Rehim, A. ^{[1
]}

Alexandrou, C. ^{[1
,2
]}

Constantinou, M. ^{[1
]}

Drach, V. ^{[3
]}

Hadjiyiannakou, K. ^{[2
]}

Jansen, K. ^{[2
,3
]}

Koutsou, G. ^{[1
]}

Vaquero, A. ^{[1
]}

机构：

[1] Cyprus Inst, Computat Based Sci & Technol Res Ctr, CY-2121 Nicosia, Cyprus

[2] Univ Cyprus, Dept Phys, CY-1678 Nicosia, Cyprus

[3] DESY, D-15738 Zeuthen, Germany

来源：

PHYSICAL REVIEW D | 2014年 / 89卷 / 03期

关键词：

MONTE-CARLO;

D O I：

10.1103/PhysRevD.89.034501

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We perform a high statistics calculation of disconnected fermion loops on graphics processing units for a range of nucleon matrix elements extracted using lattice QCD. The isoscalar electromagnetic and axial vector form factors, the sigma terms and the momentum fraction and helicity are among the quantities we evaluate. We compare the disconnected contributions to the connected ones and give the physical implications on nucleon observables that probe its structure.

引用

页数：14

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