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19922026
Showing 1992Show all

8 papers · 1 filter

nucl-th1992★ 30 cited

High-energy pion-nucleus elastic scattering

C. M. Chen, D. J. Ernst, M. B. Johnson

We investigate theoretical approaches to pion--nucleus elastic scattering at high energies (300 1 GeV). A ``model--exact'' calculation of the lowest--order microscopic…

gr-qc1992★ 56 cited

Gauge Field Back-reaction on a Black Hole

David Hochberg, Thomas W. Kephart

The order fluctuations of gauge fields in the vicinity of a blackhole can create a repulsive antigravity region extending out beyond the renormalized Schwarzschild horizon.…

gr-qc1992★ 63 cited

Wormhole Cosmology and the Horizon Problem

David Hochberg, Thomas W. Kephart

We construct an explicit class of dynamic lorentzian wormholes connecting Friedmann-Robertson-Walker (FRW) spacetimes. These wormholes can allow two-way transmission of signals bet…

gr-qc1992★ 84 cited

Positivity of Entropy in the Semi-Classical Theory of Black Holes and Radiation

David Hochberg, Thomas Kephart, James W. York

Quantum stress-energy tensors of fields renormalized on a Schwarzschild background violate the classical energy conditions near the black hole. Nevertheless, the associated equilib…

hep-ph1992★ 2 cited

Search for Dileptons in Z decay

P. H. Frampton, Daniel Ng, T. W. Kephart +1

The lepton family number violation boson decay, or , mediated by a dilepton, e.g. from an SU(15) theory, is calculated. The branching ratio o…

hep-th1992★ 12 cited

Generalized Semilocal Theories and Higher Hopf Maps

Mark Hindmarsh, Richard Holman, Thomas W. Kephart +1

\def\mon{S^3\stackrel{S^1}{\rightarrow}S^2} \def\inst{S^7\stackrel{S^3}{\rightarrow}S^4} \def\octo{S^{15}\stackrel{S^7}{\rightarrow}S^8} In semilocal theories, the vacuum manifold…

hep-ph1992★ 15 cited

Semiclassical Gravity and Invisible Axions

R. Holman, T. W. Kephart, Soo-Jong REY

We show that charged Eguchi-Hanson instantons provide a concrete and calculable new source of intrinsic Peccei-Quinn symmetry breaking by quantum gravity. The size of this breaking…

hep-ph1992★ 477 cited

Solutions to the strong CP problem in a world with gravity

R. Holman, S. D. H. Hsu, T. Kephart +3

We examine the sensitivity of several solutions of the strong-CP problem to violations of global symmetries by Planck scale physics. We find that the Peccei-Quinn solution is extre…