Slow nucleation rates in Chain Inflation with QCD Axions or Monodromy

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dc.creatorAshoorioon, Amjad
dc.creatorFreese, Katherine
dc.creatorLiu, James T.
dc.date2008-10-01
dc.date.accessioned2026-07-07T12:55:13Z
dc.date.available2026-07-07T12:55:13Z
dc.descriptionThe previous proposal (by two of us) of chain inflation with the QCD axion is shown to fail. The proposal involved a series of fast tunneling events, yet here it is shown that tunneling is too slow. We calculate the bubble nucleation rates for phase transitions in the thick wall limit, approximating the barrier by a triangle. A similar problem arises in realization of chain inflation in the string landscape that uses series of minima along the monodromy staircase around the conifold point. The basic problem is that the minima of the potential are too far apart to allow rapid enough tunneling in these two models. We entertain the possibility of overcoming this problem by modifying the gravity sector to a Brans-Dicke theory. However, one would need extremely small values for the Brans-Dicke parameter. Many successful alternatives exist, including other "axions" (with mass scales not set by QCD) or potentials with comparable heights and widths that do not suffer from the problem of slow tunneling and provide successful candidates for chain inflation.
dc.description6 pages, 1 figure
dc.identifierhttps://arxiv.org/abs/0810.0228
dc.identifierhttp://arxiv.org/abs/0810.0228
dc.identifierPhys.Rev.D79:067302,2009
dc.identifierdoi:10.1103/PhysRevD.79.067302
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/224185
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Theory
dc.titleSlow nucleation rates in Chain Inflation with QCD Axions or Monodromy
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