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Minimal Composite Inflation, JCAP 1105 (2011) 007
In collaboration w/t:
- Prof. Francesco Sannino, CP3-Origins & DIAS
- Jakob J. Joergensen, PhD student
Inflation!
Phongpichit Channuie!
Japan-Thai Workshop on Cosmology!December 26, 2012, Dusit Thani, Pattaya!
Faculty of Liberal Arts and Science!Kasetsart University, Kamphaeng Saen Campus!
Milestone!
(Slow-roll)
Inflation!(Minimal Walking)
Technicolor!
Marriage!
(Slow-roll)
Inflation!(Minimal Walking)
Technicolor!
Marriage!
(Slow-roll)
Inflation!(Minimal Walking)
Technicolor!
Marriage!
Two birds w/t !one stone!
the EW symmetry
composite inflaton
descendant!
Cosmic Inflation!
- Flatness problem!
- Horizon problem!
- Monopole density!
Outline
• Technicolor: A short Recap
• Marriage: Composite Inflation
• Summary and Outlook
Technicolor:!A !
short !recap!
Scalar field drawback
1
has to be determined up to 32nd digit to cancel the correction!!
Graceful exists for the hierarchy problem!!
Supersymmetry !(SUSY)!
2
Technicolor!
Technicolor Paradigm: A Naïve Idea
A Thought Experiment: the SM without elementary Higgs
• In QCD, the chiral condensate breaks EW symmetry
• But at a wrong scale (three orders of magnitude)
3
A Scale-up QCD: A simple TC
• Adding another strongly interacting theory into the SM
• For TC:
4
SM fermion masses
• A larger TC gauge group required: ETC
• Issue: generic ETC has various generators, e.g.
SM fermion masses
• Data: very small FCNCs!!
TC-pion masses
FCNCs
✓! 5
• To distinguish we assume
• Require large from walking theory!
• The “renormalization enhancement”
Ø operator generated @ ETC scale, but evaluated @ TC scale
6
• Additional constraints: S parameter
7
very small
The vacuum polarization of the third component of the isospin into the hypercharge
current
• Our shortcut: Conformal Window
SU(N) gauge group
• requires large Nf
8
F. Sannino: arXiv:0911.0931 !
Adj. representation
• M(inimal)W(alking)T(echnicolor)
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F. Sannino: arXiv:0911.0931 !
Two-index symmetic. rep.
• N(ext-to-)M(inimal)W(alking)T(echnicolor)
30
F. Sannino: arXiv:0911.0931 !
Minimal Walking TC (MWT) Summary
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33
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• techni-quarks:
33
• techni-quarks:
• additional techni-leptons:
33
• MWT field contents
Techniquarks
New Leptons
Strong Dynamics & Cosmology’s Marriage
Composite Inflation
- MCI effective theory
Weyl basis
- The MCI action
14
- The inflaton action non-minimally couples to gravity
- Large field approximation:
15
- End of inflation
- E-foldings
GUT – composite scale 16
- Amplitude of density perturbation
- Effective theory validity
Only one bird killed,
another one survived
inflation
the EW symmetry
- Minimal Walking Technicolor + slow-roll paradigm
Composite Avenue
- A pure Yang-Mills theory + slow-roll paradigm
- Orientifold theory + slow-roll paradigm
- Minimal Composite Inflation, JCAP 1105 (2011) 007
- Glueball Inflation, PRD 86 (2012) 063513
- Composite Inflation from…, PRD 86 (2012) 125035
Conclusions & Outlook
• Novel feasible models of inflation using strongly interacting theory
• The scale of composite inflation, for all the models presented here, is of the expected GUT scale
• Composite inflation needs non-minimal coupling
18
Summary and Outlook
• the search for verifiable consequences, e.g.
• Reheating
• Non-gaussianity
• ….
• Follow the talk given by Prof. Misao Sasaki
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Reheating Kinetic energy is converted
to matter and radiation
Gives rise to accelerated expansion
Slow roll
• Derivation of large non-minimal coupling
Thank you for your attention!