Connecting String Theory to Particle physics & Cosmo

Connecting String Theory to Particle Physics& Cosmology Gary ShiuUniversity of Wisconsin

D-brane In ation: hep-th/0610151. GS, B. Underwood, PRL, Non-Gaussianities in CMB:

References

S. Kecskemeti, J. Maiden, GS, B. Underwood, hep-th/0605189. D. Chialva, GS, B. Underwood, hep-th/0508229. X. Chen, M. Huang, S. Kachru, GS, hep-th/0605045. M. Huang, GS, hep-th/0610235.

D3-brane vacua in stabilized compacti cations: Warped Throats at the LHC (& beyond):GS, B. Underwood, D. Walker, K. Zurek, to appear.

O. DeWolfe, L. McAllister, GS, B. Underwood, hep-th/0703088.

A dif cult inverse problem ...

WMAP

WMAP

Strong and growing evidence for in ation

Cosmic Microwave Background

Almost scale invariant, Gaussian primordial spectrumpredicted by in ation: good agreement with data.

WMAP A tantalizing upper bound on the energy density during in ation:4 V≤ MGU T～ (1016 GeV )4, i.e., H≤ 1014 GeV

In ation as a Probe of Short Distance PhysicsQuantum Fluctuations"Freeze In" Structure

In ation

H~ constant !<" -1

-1

H~ constant !#" -1

-1

H

-1

increases

!<" -1

Imprints of short distance physics

[Easther, Greene, Kinney, GS]

[Kaloper, Kleban, Lawrence, Shenker, Susskind];[Danielsson], ...

WMAP& Beyond

Can we learn from the CMB (or other cosmological measurements) details of string compacti cation?

LHC& Beyond

Can we learn from the LHC (and beyond) details of string compacti cation?

Punch LineSubtle differences in the internal geometry can impact: Cosmology data: e.g., spectral index, non-Gaussianities of CMB. Particle physics data: e.g., heights, widths, and separations of new resonances.

the compact space:3 3 4

Becker, Becker; Sethi,Vafa, Witten

= ND3+

H∧ F χ(X )= 0 Flux Compacti cationMVarious p!cycles of M

12

1 Energy～ 8π

E2+ B2

W=M

G∧

Gukov,Vafa, Witten

Flux indued potential stabilizes moduli:[Becker, Becker];[Dasgupta, Rajesh, Sethi];[Greene, Schalm, GS];[Giddings, Kachru, Polchinski]; ...

Warped Throats

IR

AdS5

UV

Warped ThroatsStabilizing moduli

IR

AdS5

UV

Warped ThroatsStabilizing moduli e-folds of in ation

IR

AdS5

UV

Warped ThroatsStabilizing moduli Local model: explicit metric e-folds of in ation

IR

AdS5

UV