Light composite scalar in eight-flavor QCD on the lattice
Yasumichi Aoki,
Tatsumi Aoyama,
Masafumi Kurachi,
Toshihide Maskawa,
Kohtaroh Miura,
Kei-ichi Nagai,
Hiroshi Ohki,
Enrico Rinaldi,
Akihiro Shibata,
Koichi Yamawaki,
Takeshi Yamazaki
Jun 2014
Abstract
We present the first observation of a flavor-singlet scalar meson as light as the pion in QCD on the lattice, using the Highly Improved Staggered Quark action. Such a light scalar meson can be regarded as a composite Higgs with mass 125 GeV. In accord with our previous lattice results showing that the theory exhibits walking behavior, the light scalar may be a technidilaton, a pseudo Nambu-Goldstone boson of the approximate scale symmetry in walking technicolor.
Publication
Physical Review D
Research Scientist
My research interests include artificial intelligence and quantum computing applied to particle physics and quantum many-body systems.