2 papers
hep-th2001
Dispersion relations in differential form
Pavel Kolar, Jan Fischer
Various forms of derivative dispersion relations, in which the dispersion integral is replaced by a series of derivatives of the imaginary part of a scattering amplitude, are revie…
hep-ph1996
A Surprise in Sum Rules - Modulating Factors
Alexander Moroz, Jan Fischer
A generic physical situation is considered where Im , the imaginary part of polarization operator (generalized susceptibility), can be measured on a finite interval and the high…