Relative Hyperbolicity and Artin Groups

Let G=⟨ a₁,&ldots; , a_n | a_ia_ja_i&ldots; = a_ja_ia_j,&ldots; ,i>j⟩ be an Artin group and let m_ij =m_ji be the length of each of the sides of the defining relation involving a_iand a_j. We show if all m_ij ⩾ 7 then G is relatively hyperbolic in the sense of Farb with respect to the collection of its two-generator subgroups a_i, a_jfor which m_ij >&infty;.