What can we learn, if anything, from how the organizers of the ICHEP chose to represent the growing research activity in nonstring approaches to QG?(adsbygoogle = window.adsbygoogle || []).push({});

ICHEP is currently going on in Paris and has somewhat more than 1000 participants. International Conf on High Energy Physics. Largely experimental HEP, with most theory sticking close to the Standard Model.

To get perspective, there were 12 parallel sessions labeled "Beyond the Standard Model" and string talks were segregated into FOUR of these, all of which took place the first day, Thursday 22 July.

These Thursday BSM sessions were labeled "BSM (including string theory)".

It is these four Thursday BSM sessions which had some Loop, AsymSafe, and Verlinde gravity in their makeup.

The other eight BSM parallel sessions took place Friday and Saturday and were straight particle physics with no string or QG. The plenary talks will take place next week Monday-Wednesday.

So the QG presence at ICHEP is quite light, as one would expect. The interest, if any, is in what the organizers picked to have on display, in Thursday's four BSM sessions. The following is a sample:

==quote==

Planck Scale Cosmology and Asymptotic Safety in Resummed Quantum Gravity

Content: In Weinberg’s asymptotic safety approach to quantum gravity, one has a finite dimensional critical surface for a UV stable fixed point to generate a theory of quantum gravity with a finite number of physical parameters. The task is to demonstrate how this fixed point behavior actually arises. We argue that, in a recently formulated extension of Feynman’s original formulation of the theory, which we have called resummed quantum gravity, we recover this fixed-point UV behavior from an exact re-arrangement of the respective perturbative series. We argue that the results we obtain are consistent both with the exact field space Wilsonian renormalization group results of Reuter and Bonanno and with recent Hopf-algebraic Dyson-Schwinger renormalization theory results of Kreimer. We calculate the first "first principles" predictions of the respective dimensionless gravitational and cosmological constants and argue that they support the Planck scale cosmology advocated by Bonanno and Reuter as well. Comments on the prospects for actually predicting the currently observed value of the cosmological constant are also given.

Id: 159

Place:

Room: Salle 252A

Starting date:

22-Jul-2010 17:43 (Europe/Paris)

Duration: 14'

Contribution type: Parallel Session Talk

Primary Authors: WARD, Bennie (Baylor University, Waco, TX, USA)

==============

Link to Ward's slides is here:

http://indico.cern.ch/contributionDisplay.py?sessionId=47&contribId=159&confId=73513

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# AsymSafe, LQG, Verlinde at the Paris ICHEP

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