The scattering matrix for a generalgl(2) spin chain

Scattering matrix for a general gl(2) spin chain

We study the general L0-regular gl(2) spin chain, i.e. a chain where the sites {i, i + L0, i + 2L0, . . . } carry the same arbitrary representation (spin) of gl(2). The basic example of such chain is obtained for L0 = 2, where we recover the alternating spin chain. Firstly, we review different known results about their integrability and their spectrum. Secondly, we give an interpretation in ter...

The QCD spin chain S matrix

Beisert et al. have identified an integrable SU(2, 2) quantum spin chain which gives the one-loop anomalous dimensions of certain operators in large Nc QCD. We derive a set of nonlinear integral equations (NLIEs) for this model, and compute the scattering matrix of the various (in particular, magnon) excitations. 1 Department of Physics, Ewha Womans University, Seoul 120-750, South Korea 2 Phys...

Factorization of Multiparticle Scattering in the Heisenberg Spin Chain

We give an explicit proof within the framework of the Bethe Ansatz/string hypothesis of the factorization of multiparticle scattering in the antiferromagnetic spin-12 Heisenberg spin chain, for the case of 3 particles.

Continuum in the spin-excitation spectrum of a haldane chain observed by neutron scattering in CsNiCl3.

The spin-excitation continuum, expected to dominate the low-energy fluctuation spectrum in the Haldane spin chain around the Brillouin zone center, q = 0, is directly observed by inelastic magnetic neutron scattering in the S = 1 quasi-1D antiferromagnet CsNiCl3. We find that the single mode approximation fails, and that a finite energy width appears in the dynamic correlation function S(q,omeg...

Scattering Theory for the Spin Fermion Model.