Light composite scalar in eight-flavor QCD on the lattice

被引：104

作者：

Aoki, Yasumichi ^{[1
]}

Aoyama, Tatsumi ^{[1
]}

Kurachi, Masafumi ^{[1
]}

Maskawa, Toshihide ^{[1
]}

Miura, Kohtaroh ^{[1
]}

Nagai, Kei-ichi ^{[1
]}

Ohki, Hiroshi ^{[1
]}

Rinaldi, Enrico ^{[2
]}

Shibata, Akihiro ^{[3
]}

Yamawaki, Koichi ^{[1
]}

Yamazaki, Takeshi ^{[1
]}

机构：

[1] Nagoya Univ, Kobayashi Maskawa Inst Origin Particles & Univers, Nagoya, Aichi 4648602, Japan

[2] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[3] High Energy Accelerator Res Org KEK, Ctr Res Comp, Tsukuba, Ibaraki 3050801, Japan

来源：

PHYSICAL REVIEW D | 2014年 / 89卷 / 11期

关键词：

D O I：

10.1103/PhysRevD.89.111502

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the first observation of a flavor-singlet scalar meson as light as the pion in N-f = 8 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.

引用

页数：5

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