Eur. Phys. J. A (2009) 42: 601-603
https://doi.org/10.1140/epja/i2008-10744-9

Regular Article - Theoretical Physics

Two-body scattering without angular-momentum decomposition: Fully off-shell T-matrices

¹ Centro de Física Nuclear, Universidade de Lisboa, Av. Prof. Gama Pinto 2, 1649-003, Lisboa, Portugal
² Departamento de Física, Instituto Superior Técnico, Taguspark, Av. Prof. Cavaco Silva, 2780-990, Porto Salvo, Oeiras, Portugal

^* e-mail: mrodri@cii.fc.ul.pt

Received: 10 November 2008
Revised: 20 January 2009
Accepted: 12 February 2009
Published online: 7 March 2009

Abstract

Two-body scattering is studied by solving the Lippmann-Schwinger equation in momentum space without angular-momentum decomposition for a local short-range interaction plus Coulomb. The screening and renormalization approach is employed to treat the Coulomb interaction. Benchmark calculations are performed by comparing our procedure with a configuration space calculation, using the standard partial-wave decomposition, for ¹²C - ¹⁰Be elastic scattering. The fully off-shell T -matrices are also calculated for the final goal of studying the three-body scattering by solving Faddeev/AGS equations.