GAGRA
Gauge Theories and Gravity (without relying on
supersymmetry)
Abstract
GAGRA is an INFN national specific initiative whose aim is, among other ones, to employ new methods based on recent developments (M. Bochicchio [1,2,3]) for the understanding of confining asymptotically free gauge theories -- specifically of the 't Hooft large-N limit of QCD -- and for the consistent quantization of gravity (D. Anselmi [4,5,6]) that do not rely either on the simplifications furnished by the supersymmetry or on the superstring unification of all the interactions respectively.
A key role in the development of the aforementioned methods is played by the high-energy features of both large-N QCD (M. Bochicchio [1,3]) or, more generally, asymptotically free gauge theories, and of gravity (D. Anselmi [4,5]), mostly in relation to the non-perturbative (M. Bochicchio [1,3], M. Papinutto [7], D. Anselmi [4,6], F. Scardino) and perturbative (M. Becchetti [8], A. Quadri [9]) renormalization properties of the S-matrix amplitudes and correlators.
On the gauge side, the aforementioned methods provide the strongest constraints [1,2] on the high-energy non-perturbative structure of large-N QCD, and may be a powerful guide [3] to eventually construct candidates for its partial solution.
On the gravity side, the aforementioned methods have led to the construction [4] of a renormalizable [5] unitary S matrix for gravity, by means of an underlying quantization of general relativity that violates [6] microcausality.
Moreover, complementary -- but crucial -- aims are the exploration of the non-perturbative low-energy features of QCD by lattice gauge theories (M. Papinutto, F. Russo) and QCD phenomenology (A. Polosa [10], A. Pilloni [10]) and, on the gravity side, the experimental search for dark matter (A. Polosa [11]).