Lattice calculation of the magnetic moments of Δ and Ω- baryons with dynamical clover fermions

被引：57

作者：

Aubin, C. ^{[1
]}

Orginos, K. ^{[1
]}

Pascalutsa, V. ^{[2
]}

Vanderhaeghen, M. ^{[2
]}

机构：

[1] Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA

[2] Johannes Gutenberg Univ Mainz, Inst Kernphys, D-55099 Mainz, Germany

来源：

PHYSICAL REVIEW D | 2009年 / 79卷 / 05期

关键词：

FIELD;

D O I：

10.1103/PhysRevD.79.051502

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We calculate the magnetic dipole moment of the Delta (1232) and Omega(-) baryons with 2 + 1 flavors of clover fermions on anisotropic lattices using a background magnetic field. This is the first dynamical calculation of these magnetic moments using a background field technique. The calculation for Omega(-) is done at the physical strange quark mass, with the result in units of the physical nuclear magneton mu(Omega-) = - 1.93 +/- 0: 08 +/- 0: 12 ( where the first error is statistical and the second is systematic) compared to the experimental number: - 2.02 +/- 0.05. The Delta has been studied at three unphysical quark masses, corresponding to pion mass m(pi) = 366, 438, and 548 MeV. The pion mass dependence is compared with the behavior obtained from chiral effective field theory.

引用

页数：5

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