Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2008-11-17
Phys.Rev.D79:051502,2009
Physics
High Energy Physics
High Energy Physics - Lattice
4 pages, 2 figures, 2 tables, uses RevTeX
Scientific paper
10.1103/PhysRevD.79.051502
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.
Aubin Christopher
Orginos Konstantinos
Pascalutsa Vladimir
Vanderhaeghen Marc
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