The scalar spectrum of many-flavour QCD

Abstract

The LatKMI collaboration is studying systematically the dynamical properties of N_f = 4,8,12,16 SU(3) gauge theories using lattice simulations with (HISQ) staggered fermions. Exploring the spectrum of many-flavour QCD, and its scaling near the chiral limit, is mandatory in order to establish if one of these models realises the Walking Technicolor scenario. Although lattice technologies to study the mesonic spectrum are well developed, scalar flavour-singlet states still require extra effort to be determined. In addition, gluonic observables usually require large-statistic simulations and powerful noise-reduction techniques. In the following, we present useful spectroscopic methods to investigate scalar glueballs and scalar flavour-singlet mesons, together with the current status of the scalar spectrum in N_f = 12 QCD from the LatKMI collaboration.

9 pages, 5 figures, 1 table. To appear in the Proceedings of SCGT 12, KMI, Nagoya University, Dec. 4-7, 2012

Cited by in corpus (7)

• Light composite scalar in eight-flavor QCD on the lattice
• Goldstone Boson Scattering with a Light Composite Scalar
• Reaching the chiral limit in many flavor systems
• Dilaton in scalar QFT: a no-go theorem in $4-\epsilon$ and $3-\epsilon$ dimensions
• Conformality in twelve-flavour QCD
• Discovering Walking Technicolor at LHC and Lattice
• Composite flavor-singlet scalar in twelve-flavor QCD