Exact summation of leading logs around $T\bar{T}$ deformation of $O(N+1)$-symmetric 2D QFTs

Jonas Linzen, Maxim V. Polyakov, Kirill M. Semenov-Tian-Shansky +1

We consider a general (beyond $T\bar{T}$) deformation of the 2D $O(N+1)$ $\sigma$-model by the irrelevant dimension-four operators. The theory deformed in this most general way is not in…