The scale of gravity and the cosmological constant within a landscape

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dc.creatorGraesser, Michael L.
dc.creatorSalem, Michael P.
dc.date2006-11-22
dc.date2007-07-21
dc.date.accessioned2026-07-07T11:00:16Z
dc.date.available2026-07-07T11:00:16Z
dc.descriptionIt is possible that the scale of gravity, parameterized by the apparent Planck mass, may obtain different values within different universes in an encompassing multiverse. We investigate the range over which the Planck mass may scan while still satisfying anthropic constraints. The window for anthropically allowed values of the Planck mass may have important consequences for landscape predictions. For example, if the likelihood to observe some value of the Planck mass is weighted by the inflationary expansion factors of the universes that contain that value, then it appears extremely unlikely to observe the value of the Planck mass that is measured within our universe. This is another example of the runaway inflation problem discussed in recent literature. We also show that the window for the Planck mass significantly weakens the anthropic constraint upon the cosmological constant when both are allowed to vary over a landscape.
dc.description25 pages, 3 figures; v2: corrected minor computational errors in Sect. IV; v3: references added, version accepted by PRD
dc.identifierhttps://arxiv.org/abs/astro-ph/0611694
dc.identifierhttp://arxiv.org/abs/astro-ph/0611694
dc.identifierPhys.Rev.D76:043506,2007
dc.identifierdoi:10.1103/PhysRevD.76.043506
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/187645
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titleThe scale of gravity and the cosmological constant within a landscape
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