Improved Lattice Spectroscopy of Minimal Walking Technicolor

Agostino Patella; Antonio Rago; Biagio Lucini; Claudio Pica; David Henty; Eoin Kerrane; Francis Bursa; Luigi Del Debbio; Thomas Pickup

Improved Lattice Spectroscopy of Minimal Walking Technicolor

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arxiv 1104.4301 v1 pith:ILWUIQT7 submitted 2011-04-21 hep-lat

Improved Lattice Spectroscopy of Minimal Walking Technicolor

Francis Bursa , Luigi Del Debbio , David Henty , Eoin Kerrane , Biagio Lucini , Agostino Patella , Claudio Pica , Thomas Pickup

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Antonio Rago

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keywords effectsimprovedfiniteinvestigatetheoryadjointassessbehaviour

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We present a numerical study of spectroscopic observables in the SU(2) gauge theory with two adjoint fermions using improved source and sink operators. We compare in detail our improved results with previous determinations of masses that used point sources and sinks and we investigate possible systematic effects in both cases. Such comparison enables us to clearly assess the impact of a short temporal extent on the physical picture, and to investigate some effects due to the finite spatial box. While confirming the IR-conformal behaviour of the theory, our investigation shows that in order to make firm quantitative predictions, a better handle on finite size effects is needed.

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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.