Adhikari, Sadhan K. [UNESP]Frederico, T. [UNESP]2022-04-282022-04-281995-01-01Physical Review Letters, v. 74, n. 23, p. 4572-4575, 1995.0031-9007http://hdl.handle.net/11449/224475Renormalization group equations for the physical t matrix are written for quantum scattering with some potentials singular at the origin in two and three dimensions. The momentum-space perturbative treatment of these scattering problems exhibits ultraviolet divergences and permits renormalization leading to a scale. These equations yield the correct asymptotic behavior and some low-energy properties of the t matrix. Illustrations are made for the Dirac delta potential in two and three dimensions. © 1995 The American Physical Society.4572-4575engArtigo10.1103/PhysRevLett.74.45722-s2.0-10644232752