- th / 0 20 70 40 v 2 1 5 Ja n 20 03 New parameterization of the trinucleon wavefunction and its application to the π 3 He scattering length

- th / 0 20 70 40 v 1 1 5 Ju l 2 00 2 New parameterization of the trinucleon wavefunction and its application to the π 3 He scattering length

We present a new parameterization of the trinucleon wavefunction. As a novel feature a separable parameterization for the complete wavefunction is given. In this way any calculation that considers two body forces only is largely simplified. To demonstrate this we calculate the π3He scattering length. PACS: 25.80.Ls, 25.80.Hp, 25.10.+s, 21.45.+v Typeset using REVTEX

uc l - th / 0 30 10 54 v 1 1 6 Ja n 20 03 The ( π − , γγ ) reaction in nuclei and the σ meson in the medium

0 v 1 2 5 Fe b 20 03 ππ scattering S wave from the data on the reaction π − p → π 0 π 0

ar X iv : n uc l - th / 0 30 70 01 v 1 3 0 Ju n 20 03 - 1 - CORRELATION BETWEEN THE DEUTERON CHARACTERISTICS AND THE LOW - ENERGY TRIPLET np SCATTERING PARAMETERS

v 2 1 5 O ct 1 99 8 Elastic Scattering of Pions From the Three - nucleon System

We examine the scattering of charged pions from the trinucleon system at a pion energy of 180 MeV. The motivation for this study is the structure seen in the experimental angular distribution of back-angle scattering for π +-3 He and π −-3 H but for neither π −-3 He nor π +-3 H. We consider the addition of a double spin flip term to an optical model treatment and find that, though the contribut...