2 papers
hep-ph2004
Two-loop helicity amplitudes for fermion-fermion scattering
A. De Freitas, Z. Bern
We discuss the calculation of two-loop helicity amplitudes for quark-quark scattering in QCD and four-gluino scattering in N=1 supersymmetric Yang-Mills theory. We study the depend…
hep-th1999
Partial algebraization and a q-deformed harmonic oscillator
Abilio De Freitas, Sebastian Salamo
From the algebraic treatment of the quasi-solvable systems, and a q-deformation of the associated algebra, we obtain exact solutions for the q-deformed Schrodinger equation…