Composite-Particle Scattering in Nonrelativistic Off-Shell Theory
نویسندگان
چکیده
منابع مشابه
More Effective Field Theory for Nonrelativistic Scattering
An effective field theory treatment of nucleon-nucleon scattering at low energy shows much promise and could prove a useful tool in the study of nuclear matter at both ordinary and extreme densities. The analysis is complicated by the existence a large length scale — the scattering length — which arises due to couplings in the short distance theory being near critical values. I show how this ca...
متن کاملDeep-inelastic scattering from off-shell nucleons.
We derive the general structure of the hadronic tensor required to describe deep-inelastic scattering from an off-shell nucleon within a covariant formalism. Of the large number of possible off-shell structure functions we find that only three contribute in the Bjorken limit. In our approach the usual ambiguities encountered when discussing problems related to off-shellness in deep-inelastic sc...
متن کاملParticle production from off-shell nucleons
Particle production in equilibrium and nonequilibrium quantum systems is calculated. The effects of the off-shell propagation of nucleons in medium on the particle production are discussed. Comparision to the semiclassical production rate is given. The production of mesons and hard photons in intermediate energy heavy ion collisions is considered to be sensitive to the collision dynamics and to...
متن کاملOff - shell effects on particle production ∗
We investigate the observable effects of off-shell propagation of nucleons in heavy-ion collisions at SIS energies. Within a semi-classical BUU transport model we find a strong enhancement of subthreshold particle production when off-shell nucleons are propagated. During the past 15 years semi-classical transport models have extensively and quite successfully been applied to the description of ...
متن کاملImproved off-shell scattering amplitudes in string field theory and new computational methods
We report on new results in Witten’s cubic string field theory for the off-shell factor in the 4-tachyon amplitude that was not fully obtained explicitly before. This is achieved by completing the derivation of the Veneziano formula in the Moyal star formulation of Witten’s string field theory ~MSFT!. We also demonstrate a detailed agreement of MSFT with a number of on-shell and off-shell compu...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Progress of Theoretical Physics
سال: 1965
ISSN: 0033-068X,1347-4081
DOI: 10.1143/ptp.34.74