1202.4712 (Yasumichi Aoki et al.)

Many flavor QCD as exploration of the walking behavior with the
approximate IR fixed point    [PDF]

Yasumichi Aoki, Tatsumi Aoyama, Masafumi Kurachi, Toshihide Maskawa, Kei-ichi Nagai, Hiroshi Ohki, Akihiro Shibata, Koichi Yamawaki, Takeshi Yamazaki

We present the first report of the LatKMI collaboration on the the lattice
QCD simulation performed at the KMI computer, "$\varphi$", for the cases of 4
flavors and 8 flavors, the latter being expected to be a candidate for the
walking technicolor having an approximate scale invariance near the infrared
fixed point. The simulation was carried out based on the highly improved
staggered quark (HISQ) action. In this proceedings, we report preliminary
results on the spectrum, analyzed through the chiral perturbation theory and
the finite-size hyperscaling. We observe qualitatively different behavior of
the 8-flavor case in contrast to the 4-flavor case which shows clear indication
of the hadronic phase as in the usual QCD.

View original: http://arxiv.org/abs/1202.4712