Uniform annihilators of local cohomology of extended Rees rings

The purpose of the paper is to study the annihilators of local cohomology of the extended Rees rings. We will prove that if (A,m) is a noetherian local ring with infinite residue field, and a is a uniform local cohomological annihilator of A, then there is an integer n such that (at)n is a uniform local cohomological annihilator of the extended Rees ring A[t,t−1I] for any m-primary ideal I of A.