Lattice Numerical simulation of strong gauge dynamics for beyond the standard model
| Project/Area Number |
25800139
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Institute of Physical and Chemical Research (2015)
Nagoya University (2013-2014) |
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Principal Investigator |
Hiroshi Ohki 国立研究開発法人理化学研究所, 仁科加速器研究センター, 基礎科学特別研究員 (50596939)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | 素粒子論 / 格子ゲージ理論 / 素粒子 |
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| Outline of Final Research Achievements |
Non-perturbative nature of many-flavor QCD through the numerical simulation of the lattice gauge theory within the framework of the (walking) technicolor model has been investigated. Many-flavor QCD is a good candidate for the walking technicolor, where the flavor singlet scalar can be regarded as a technidilaton, a pseudo Nambu-Goldstone boson of the approximate scale symmetry.
In this work, we studied the flavor dependence of the low-energy behavior systematically in comparison with various number of flavor Nf=(0), 8, 12 based on a unique lattice setup. We discovered a signal of a flavor-singlet scalar meson lighter than the pseudo scalar in Nf =12 case. In Nf =8 case, we also observed a flavor-singlet scalar with mass comparable to or slightly smaller than that of the pseudo scalar in the fermion mass range of our simulations. This is a hint of the technidilaton as a composite Higgs to be identified with the Higgs boson which was discovered at LHC.
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Report
(4 results)
Research Products
(24 results)
