A numerical investigation of orientifold planar equivalence for quenched mesons

作者：Lucini Biagio^*; Moraitis Gregory; Patella Agostino; Rago Antonio

来源：Physical Review D - Particles, Fields, Gravitation and Cosmology, 2010, 82(11): 114510.

DOI：10.1103/PhysRevD.82.114510

We measure on the lattice the quenched pseudoscalar and vector meson masses at a fixed value of the lattice spacing for SU(N) gauge theory with fermions in the adjoint, in the symmetric and in the antisymmetric representation of the gauge group. Simulations are performed for N = 3, 4, 6 in all those representations, with the addition of N = 2 for the adjoint representation. We illustrate a strategy for separating the even from the odd-power contributions in 1/N in the masses. Using this technique, we extrapolate the vector mass to the large-N limit in the chiral region and show that at N = infinity this mass is the same within errors in all the three representations, as predicted by orientifold planar equivalence. Possible implications of our investigation for studying orientifold planar equivalence in the dynamical case are discussed.

• 出版日期2010-12-20