Adhikari, S. K.2014-05-202014-05-202002-03-04Physics Letters A. Amsterdam: Elsevier B.V., v. 294, n. 5-6, p. 308-313, 2002.0375-9601http://hdl.handle.net/11449/23377The low-energy scattering of ortho positronium (Ps) by ortho Ps has been studied in a full quantum mechanical coupled-channel approach. In the singlet channel (total spin s(T) = 0) we find S- and P-wave resonances at 3.35 eV (width 0.02 eV) and 5.05 eV (width 0.04 eV), respectively, and a binding of 0.43 eV of Ps(2). The scattering length for s(T) = 0 is 3.95 Angstrom and for s(T) = 2 is 0.83 Angstrom. The small s(T) = 2 scattering length makes the spin-polarized ortho Ps atoms an almost noninteracting ideal gas which may undergo Bose-Einstein condensation. (C) 2002 Elsevier B.V. B.V. All rights reserved.308-313engArtigo10.1016/S0375-9601(02)00128-7WOS:000175088100010Acesso restrito8031087349809439