0000000000262453

AUTHOR

Ari Hietanen

showing 3 related works from this author

Spectrum of SU(2) gauge theory with two fermions in the adjoint representation

2008

We present preliminary results of lattice simulations of SU(2) gauge theory with two Wilson fermions in the adjoint representation. This theory has recently attracted considerable attention because it might possess an infrared fixed point (or an almost-fixed-point), and hence be a candidate for a walking technicolor theory. In this work we study the particle spectrum of the theory, and compare it with more familiar spectrum of the theory with SU(2) gauge fields and two flavors of fundamental representation fermions.

Quantum chromodynamicsPhysicsQuantum gauge theory010308 nuclear & particles physicsHigh Energy Physics::LatticeHigh Energy Physics - Lattice (hep-lat)High Energy Physics::PhenomenologyLattice field theoryFOS: Physical sciencesYang–Mills theory01 natural sciencesTheoretical physicsHigh Energy Physics - LatticeHamiltonian lattice gauge theoryLattice gauge theoryQuantum mechanics0103 physical sciences010306 general physicsColor chargeGauge anomalyProceedings of The XXVI International Symposium on Lattice Field Theory — PoS(LATTICE 2008)
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Spectrum of SU(2) lattice gauge theory with two adjoint Dirac flavours

2008

An SU(2) gauge theory with two fermions transforming under the adjoint representation of the gauge group may appear conformal or almost conformal in the infrared. We use lattice simulations to study the spectrum of this theory and present results on the masses of several gauge singlet states as a function of the physical quark mass determined through the axial Ward identity and find indications of a change from chiral symmetry breaking to a phase consistent with conformal behaviour at beta_L ~ 2. However, the measurement of the spectrum is not alone sufficient to decisively confirm the existence of conformal fixed point in this theory as we show by comparing to similar measurements with fun…

QuarkCoupling constantPhysicsNuclear and High Energy Physics010308 nuclear & particles physicsHigh Energy Physics::LatticeLattice field theoryHigh Energy Physics - Lattice (hep-lat)FOS: Physical sciences01 natural sciencesTheoretical physicsHigh Energy Physics - LatticeGauge groupLattice gauge theory0103 physical sciencesGauge theory010306 general physicsChiral symmetry breakingSpecial unitary group
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Minimal technicolor on the lattice

2009

Abstract We present results from a lattice study of SU(2) gauge theory with 2 flavors of Dirac fermions in adjoint representation. This is a candidate for a minimal (simplest) walking technicolor theory, and has been predicted to possess either an IR fixed point (where the physics becomes conformal) or a coupling which evolves very slowly, so-called walking coupling. In this initial part of the study we investigate the lattice phase diagram and the excitation spectrum of the theory.

PhysicsNuclear and High Energy PhysicsHigh Energy Physics::LatticeLattice field theoryTechnicolorFixed pointsymbols.namesakeHamiltonian lattice gauge theoryDirac fermionQuantum mechanicsLattice gauge theorysymbolsGauge theoryLattice model (physics)Mathematical physicsNuclear Physics A
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