动力学三叶草费米子的δ和ω ^-重子的磁矩
Magnetic Moments of Delta and Omega^- Baryons with Dynamical Clover Fermions
摘要：
我们利用背景磁场计算了各向异性晶格上Delta（1232）和Omega^-重子与2+1-味三叶草费米子的磁偶极矩。这是第一次使用背景场技术动态计算这些磁矩。Ω ^-的计算是在物理奇异夸克质量下进行的，结果是物理核磁子μ_Ω ^-= -1.93（8）（12）（其中第一个误差是统计误差，第二个误差是系统误差），而实验值是-2.02（5）。在三种非物理夸克质量下研究了Delta，对应于π介子质量m_pi = 366，438和548 MeV。与从手征有效场论得到的行为的π质量的依赖性进行了比较。
英文摘要：
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(8)(12) (where the first error is statistical and the second is systematic) compared to the experimental number: -2.02(5). 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.
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