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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)

9  

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

11  

33  

33  

33  

33  

•  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

19  

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!