Neutrino masses in the Standard Model effective field theory

We compute the leading-logarithmic correction to neutrino mass matrix in Standard Model effective field theory (SMEFT) dimension seven. In limit of negligible lepton and down-type quark Yukawa couplings, it receives contributions from Weinberg dimension-five operator as well 11 dimension-six five dimension-seven independent interactions. Two main implications we derive this result are following. First, find operators which, despite violating number, do not renormalise masses at one loop. And second, demonstrate that presence around TeV scale can modify prediction by up $\mathcal{O}(50\,\%)$. Our comprises also step forward towards renormalisation SMEFT order $v^3/\Lambda^3$.