DOI 10.1007/s100520000439
A path integral approach to inclusive processes
O. Nachtmann - A. Rauscher
Institut für Theoretische Physik,
Universität Heidelberg,
Philosophenweg 16,
69120 Heidelberg, Germany
Received: 8 March 2000 / Published online: 6 July 2000
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© Springer-Verlag 2000
Dedicated to Prof. Franz Wegner on the Occasion of his 60th Birthday
Abstract
The single-particle inclusive differential
cross-section
for a reaction
is written as the imaginary part of a
correlation function in a forward scattering amplitude for
in a modified effective theory. In this modified theory the interaction
Hamiltonian
equals HI in the original theory up to a
certain time. Then there is a sign change and
becomes
nonlocal. This is worked out in detail for scalar field models and for
QED plus the abelian gluon model. A suitable path integral for direct
calculations of inclusive cross sections is presented.
Copyright Società Italiana di Fisica, Springer-Verlag 2000
