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The Cosmological Constant Problem
Astronomical observations indicate that the cosmological constant is many orders of magnitude smaller than estimated in modern theories of elementary particles. After a brief review of the history ofExpand
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Infrared photons and gravitons
It is shown that the infrared divergences arising in the quantum theory of gravitation can be removed by the familiar methods used in quantum electrodynamics. An additional divergence appears whenExpand
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The Quantum Theory of Fields, Vol. 1: Foundations
Cambridge University Press) Available for the first time in paperback, The Quantum Theory of Fields is a self-contained, comprehensive, and up-to-date introduction to quantum field theory from NobelExpand
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Quantum contributions to cosmological correlations
The 'in-in' formalism is reviewed and extended, and applied to the calculation of higher-order Gaussian and non-Gaussian correlations in cosmology. Previous calculations of these correlationsExpand
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Photons and Gravitons in S-Matrix Theory: Derivation of Charge Conservation and Equality of Gravitational and Inertial Mass
We give a purely S-matrix-theoretic proof of the conservation of charge (defined by the strength of soft photon interactions) and the equality of gravitational and inertial mass. Our only assumptionsExpand
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Nuclear forces from chiral Lagrangians
The method of phenomenological lagrangians is used to derive the consequences of spontaneously broken chiral symmetry for the forces among two or more nucleons.
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A new light boson
It is pointed out that a global U(1) symmetry, that has been introduced in order to preserve the parity and time-reversal invariance of strong interactions despite the effects of instantons, wouldExpand
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Effective chiral lagrangians for nucleonpion interactions and nuclear forces
The general chiral invariant effective lagrangians is used to study the leading terms in powers of momenta in the S-matrix for a process involving arbitrary numbers of low-momentum pions andExpand
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Symmetry Breaking and Scalar Bosons
There are reasons to suspect that the spontaneous breakdown of the gauge symmetries of the observed weak and electromagnetic interactions may be produced by the vacuum expectation values of masslessExpand
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