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The spectrum and mass anomalous dimension of SU(2) adjoint QCD with two Dirac flavours

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arxiv 1610.01576 v2 pith:4PRDYSHD submitted 2016-10-05 hep-lat

The spectrum and mass anomalous dimension of SU(2) adjoint QCD with two Dirac flavours

Georg Bergner , Pietro Giudice , Istvan Montvay , Gernot M\"unster , Stefano Piemonte This is my paper
classification hep-lat
keywords massanomalousdimensiongaugespectrumadjointcouplingdirac
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In this work we present the results of our investigation of \su{2} gauge theory with two Dirac fermions in the adjoint representation (aQCD2), which belongs to the class of strongly interacting gauge theories that are of basic interest for extensions of the Standard Model. We have done numerical lattice simulations of this theory at two different values of the gauge coupling and several fermion masses. Our results include the particle spectrum and the mass anomalous dimension. The spectrum contains new exotic fermion-gluon states and flavour-singlet mesons. The mass anomalous dimension is determined from the scaling of the masses and the mode number. The remnant dependence of the universal mass ratios and mass anomalous dimension on the gauge coupling indicates the relevance of scaling corrections, such that earlier estimations for the universal fixed point value of the mass anomalous dimension are incomplete without their inclusion.

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  1. SU(2) gauge theory with one and two adjoint fermions towards the continuum limit

    hep-lat 2024-07 unverdicted novelty 5.0

    Extended lattice simulations yield continuum-limit anomalous dimensions γ* = 0.170(6) for Nf=1 and γ* = 0.291(9) for Nf=2 adjoint SU(2), with chiral perturbation theory ruling out spontaneous chiral symmetry breaking.