H.W. Hamber, R.M. Williams, Newtonian potential in quantum Regge gravity, report CERN-TH.7314/94, DAMTP-94-49, June 1994.  Home/Search   Document Not in Database   Summary   Related Articles

....c j (G) j . Some recent, preliminary results of non perturbative simplicial quantum gravity are then employed to estimate the effective values of G and G. It turns out that a short lifetime of the graviton cannot be excluded. The recent advances of non perturbative simplicial quantum gravity [1, 2, 3] have made possible a computation of the scale dependence of the Newton constant G and especially of the adimensional product G. In this paper we consider a process, the decay of the graviton, whose probability admits a very simple expression in terms of G and G, and we give a general estimate for ....

....stage of the order 10 Gamma12 . vanishes in the continuum quantum theory, confirming a recent analytical computation of Greensite ( 5] compare also the praevious works of Coleman [6] Taylor and Veneziano [7] and the review of Weinberg [8] Using the preliminary non perturbative results of [2], we now make these considerations more quantitative. In the action (9) the parameter has the task of fixing the length scale, so that every dimensional quantity is proportional to some power of . In the following, we denote with a tilde quantities which are pure numbers. For instance, the mean ....

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H.W. Hamber, R.M. Williams, Newtonian potential in quantum Regge gravity, report CERN-TH.7314/94, DAMTP-94-49, June 1994.

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