S. Weinberg, "Theories of the Cosmological Constant" (astro-ph9610044).  Home/Search   Document Not in Database   Summary   Related Articles

....in this theory as well. In any case, no mechanism is known on how to explain the way contributions to the vacuum energy from large vacuum expectation values are cancelled such that compatibility with observations are achieved (for a discussion of the most salient (failed) attempts see [19] and [20] for an update) String theory has however, some features as well as symmetries that put this difficulty in a somewhat different standing. Strings are non local objects and that gives origin, as depicted in (1) to interactions that are not present in renormalizable field theories. It is ....

S. Weinberg, "Theories of the Cosmological Constant" (astro-ph9610044).

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