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arXiv · 0811.2440

Magnetic Moments of Delta and Omega^- Baryons with Dynamical Clover Fermions

C. Aubin·K. Orginos·V. Pascalutsa·M. Vanderhaeghen
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Abstract

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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C. Aubin, K. Orginos, V. Pascalutsa, M. Vanderhaeghen. 2008-11-17. Magnetic Moments of Delta and Omega^- Baryons with Dynamical Clover Fermions. https://doi.org/10.1103/physrevd.79.051502

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