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.
@article{arxiv.1302.4577,
title = {The scalar spectrum of many-flavour QCD},
author = {Yasumichi Aoki and Tatsumi Aoyama and Masafumi Kurachi and Toshihide Maskawa and Kei-ichi Nagai and Hiroshi Ohki and Enrico Rinaldi and Akihiro Shibata and Koichi Yamawaki and Takeshi Yamazaki},
journal= {arXiv preprint arXiv:1302.4577},
year = {2017}
}
Comments
9 pages, 5 figures, 1 table. To appear in the Proceedings of SCGT 12, KMI, Nagoya University, Dec. 4-7, 2012