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# ICHEP2012

4-11 July 2012
Melbourne Convention and Exhibition Centre
Australia/Melbourne timezone
ICHEP2012 - 36th International Conference for High Energy Physics

## An Estimate of Lambda in Resummed Quantum Gravity in the Context of Asymptotic Safety and Planck Scale Cosmology: Constraints on SUSY GUTS

5 Jul 2012, 14:40
15m
Room 218 (Melbourne Convention and Exhibition Centre)

### Room 218

#### Melbourne Convention and Exhibition Centre

Melbourne Australia
Parallel Sessions Track 12. Formal Theory Developments

### Speaker

Prof. Bennie Ward (Baylor University (US))

### Description

We use the amplitude-based resummation of Feynmans formulation of Einsteins theory to arrive at a UV finite approach to quantum gravity. We show that we recover the UV fixed point recently claimed by the exact field-space renormalization group approach. We use our approach in the context of the attendant Planck scale cosmology formulation of Bonanno and Reuter to estimate the value of the cosmological constant as \rho_\Lambda=(0.0024 ev)^4. We show that the closeness of this estimate to experiment constrains susy GUT models.

### Primary author

Prof. Bennie Ward (Baylor University (US))

 Slides