Nuclear Physics B267 (1986) 1-24 ' North-Holland Publishing Company KAZAMA-YANG MONOPOLE-FERMION SCATFERING STATES Khre OI.AUSSEN Institute of Theoretical Physics, Untt;ersto" o f Trondheim, N T/1, N-7034 7)'ondhetm, Nont'al Haakon A. OI.SEN Institute of Phv,sics, I,.'mt'er.si(v of Trondheim, A VII, N- 7055 Dragvoll, Norway Per OSLAND t Deutsche.s Elektronen Swlchrotron DES }'. D-2000 Ilamtmrg 52. Federal R~Tmhli~ q[ Germany, and Gordon McKav l.ahorato(v, llarvard Univer.~i(l', ("amhrid,~e, 3,tussa~husett.~ 02138, I,S,-! In,laid OVERB~ Instttute of Ptlvsw.s. Umt'ersttv of l'rondheim, ,4 k'lt, N- 7055 Dra~t'oll, ,¥orwav Received 24 September 1985 Scattering .,,tales of definite helicitv are constructed - in term.,, of partial-wave expansions - for a point ferminn with spin ~2and an extra magnetic moment in the field of an infinitel~ heav; Dirac monopole, i.e., with the Kazama-Yang hamihonian. The approximate ~olution~, thus obtained which are valid for small velocities, fl 4: 1, are useful for exaluating capture cros~ ~ections I. Introduction The Kazama-Yang hamiltonian [1], o.°r = ,.(p - Zea) + pM - q/3 ,VL3-, describes the interaction between an infinitely heavy Dirac monopole and a spin- fermion with charge Ze, mass M, and magnetic moment Ze(l + ~)/2M. The quantity q, related to the strength g of the monopole by q = Zeg, (1.2) is an integral multiple of ',Z. Furthermore, in (1.1) e,, i = 1,2,3, and ,8 are Dirac matrices. (In the following, the fermion velocity will be denoted by ,8.) I Work supported in part by the US l)epartment of I-nergy under grant I)E-F(i02-g4ER4015g 1