Dispersive and absorptive corrections to the pion-deuteron scattering length

Research paper by V. Lensky, V. Baru, J. Haidenbauer, C. Hanhart, A. Kudryavtsev, U. -G. Meißner

Indexed on: 20 Dec '06Published on: 20 Dec '06Published in: Nuclear Theory


We present a parameter--free calculation of the dispersive and absorptive contributions to the pion--deuteron scattering length based on chiral perturbation theory. We show that once all diagrams contributing to leading order to this process are included, their net effect provides a small correction to the real part of the pion--deuteron scattering length. At the same time the sizable imaginary part of the pion--deuteron scattering length is reproduced accurately.