Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 11, Pages -Publisher
SPRINGER
DOI: 10.1088/1126-6708/2008/11/009
Keywords
Lattice QCD; Beyond Standard Model; Lattice Gauge Field Theories; Technicolor and Composite Models
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We eport on numerical simulations of SU(2) lattice gauge theory with two flavors of light dynamical quarks in the adjoint of the gauge group.The dynamics of this theory is thought to be very different from QCD -the theory exhibiting conformal or near conformal behavior in the infrared. We make a high resolution survey of the phase diagram of this model in the plane of the bare coupling and quark mass on lattices of size 8(3)x16. Our simulations reveal a line of first order phase transitions extending from beta = beta(c) similar to 2.0. For beta > beta(c) thephase boundary is no longer first order but continues as he locus of minimum meson mass. For beta > beta(c) we observe the pion and rho masses along the phase boundary to be light, independent of bare coupling and approximately degenerate. We discuss possible interpretations of these observations and corresponding continuum limits.
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