σ-pole residues in gluon D-form factors for π, N, ρ and Δ are consistent with dilaton effective theory predictions within large uncertainties.
Holographic techni-dilaton at 125 GeV
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We find that a holographic walking technicolor model has a limit ("conformal limit") where the techni-dilaton (TD) becomes an exactly massless Nambu-Goldstone boson of the scale symmetry with its nonzero finite decay constant F_phi /= 0, which naturally realizes a light TD, say at 125 GeV, near the limit. In such a light TD case, we find that F_phi is uniquely determined by the techni-pion decay constant F_pi independently of the holographic parameters: F_phi/F_pi ~= sqrt{2 N_TF}, with N_TF being the number of techni-fermions. We show that the holographic TD is consistent with a new boson at 125 GeV recently discovered at the LHC.
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Gluon Gravitational $ D$-Form Factor: The $\sigma$-Meson as a Dilaton Confronted with Lattice Data II
σ-pole residues in gluon D-form factors for π, N, ρ and Δ are consistent with dilaton effective theory predictions within large uncertainties.