Asymptotic safety in O(N) scalar models coupled to gravity

作者：Labus Peter; Percacci Roberto^*; Vacca Gian Paolo

来源：Physics Letters B, 2016, 753: 274-281.

DOI：10.1016/j.physletb.2015.12.022

We extend recent results on scalar-tensor theories to the case of an O(N)-invariant multiplet. Some exact fixed point solutions of the RG flow equations are discussed. We find that also in the functional context, on employing a standard "type-I" cutoff, too many scalars destroy the gravitational fixed point. For d = 3 we show the existence of the gravitationally dressed Wilson-Fisher fixed point also for N > 1. We discuss also the results of the analysis for a different, scalar-free, coarse-graining scheme.

• 出版日期2016-2-10