One can evaluate the action for a gravitational field on a section of the complexified spacetime which avoids the singularities. In this manner we obtain finite, purely imaginary values for the ...

Cambridge U. and Munich, Max Planck Inst.

Analytical experessions for the e + e − → μ + μ − cross section including all the one-loop radiative corrections in the context of the Weinberg model are presented. The systematic calculation of ...

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The production of axions in the early universe is studied. Axion models which break the U(1) PQ symmetry above 10 12 GeV are found to produce an unacceptably large axion energy density.

Information theory provides a constructive criterion for setting up probability distributions on the basis of partial knowledge, and leads to a type of statistical inference which is called the ...

The completely general one-loop scalar one-, two-, three- and four-point functions are studied. Also an integral occurring in connection with soft bremsstrahlung is considered. Formulas in terms of ...

Part of Physics and mathematics of strings: Memorial volume for Vadim Knizhnik, 509-529 ...

The Klein-Gordon equation for a scalar field of mass μ is analyzed in the geometry of a rotating black hole. It is shown that in the limit μM≪1, i.e., particle Compton wavelength much larger than the ...

Two formulations for constructing a non-Hermitian matrix with all real eigenvalues are studied. They are called PT symmetry and pseudo-Hermiticity in the literature. Explicit 2 × 2 matrices of both ...

INFN, Naples and Naples U.

Some aspects of a field theory, similar to but more realistic than, that examined in the preceding paper are discussed. The way in which a non-linear meson field theory of this type may contain its ...