2nd Black Book - CP3-Origins

is (almost) conformal in the infrared, while spontaneous chiral symmetry breaking seems less
plausible.
Mesonic spectroscopy of Minimal Walking Technicolor.
Luigi Del Debbio, (Edinburgh U.) , Biagio Lucini, Agostino Patella, (Swansea U.) , Claudio Pica, (Southern
Denmark U., CP3-Origins) , Antonio Rago, (Wuppertal U.) . CP3-ORIGINS-2010-12, WUB-10-06, Apr 2010.
(Published Jul 1, 2010). 16pp.
Published in Phys.Rev.D82:014509,2010.
e-Print: arXiv:1004.3197 [hep-lat]
The infrared dynamics of Minimal Walking Technicolor
We studied the gauge sector of Minimal Walking Technicolor, which is an SU(2) gauge theory
with nf=2 flavors of Wilson fermions in the adjoint representation. Numerical simulations are
performed on lattices Nt x Ns^3, with Ns ranging from 8 to 16 and Nt=2Ns, at fixed \beta=2.25,
and varying the fermion bare mass m0, so that our numerical results cover the full range of
fermion masses from the quenched region to the chiral limit. We present results for the string
tension and the glueball spectrum. A comparison of mesonic and gluonic observables leads to
the conclusion that the infrared dynamics is given by an SU(2) pure Yang-Mills theory with a
typical energy scale for the spectrum sliding to zero with the fermion mass. The typical mesonic
mass scale is proportional to, and much larger than this gluonic scale. Our findings are compatible
with a scenario in which the massless theory is conformal in the infrared. An analysis of
the scaling of the string tension with the fermion mass towards the massless limit allows us to
extract the chiral condensate anomalous dimension \gamma*, which is found to be
\gamma*=0.22+-0.06.
The infrared dynamics of Minimal Walking Technicolor.
Luigi Del Debbio, Biagio Lucini, Agostino Patella, Claudio Pica, Antonio Rago, . CP3-ORIGINS-2010-13,
WUB-10-07, Apr 2010. 29pp. Temporary entry
Published in Phys.Rev.D82:014510,2010.
e-Print: arXiv:1004.3206 [hep-lat]
22 CP³-Black book