Peaks above the Harrison-Zel'dovich spectrum due to the Quark-Gluon to Hadron Transition

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dc.creatorSchmid, Christoph
dc.creatorSchwarz, Dominik J.
dc.creatorWiderin, Peter
dc.date1996-06-20
dc.date1996-11-25
dc.date.accessioned2026-07-07T11:34:04Z
dc.date.available2026-07-07T11:34:04Z
dc.descriptionThe quark-gluon to hadron transition affects the evolution of cosmological perturbations. If the phase transition is first order, the sound speed vanishes during the transition, and density perturbations fall freely. This distorts the primordial Harrison-Zel'dovich spectrum of density fluctuations below the Hubble scale at the transition. Peaks are produced, which grow at most linearly in wavenumber, both for the hadron-photon-lepton fluid and for cold dark matter. For cold dark matter which is kinetically decoupled well before the QCD transition clumps of masses below $10^{-10} M_\odot$ are produced.
dc.descriptionExtended version, including evolution of density perturbations for a bag model and for a lattice QCD fit (3 new figures). Spectrum for bag model (old figure) is available in astro-ph/9611186. 9 pages RevTeX, uses epsf.sty, 3 PS figures
dc.identifierhttps://arxiv.org/abs/astro-ph/9606125
dc.identifierhttp://arxiv.org/abs/astro-ph/9606125
dc.identifierPhys.Rev.Lett.78:791-794,1997
dc.identifierdoi:10.1103/PhysRevLett.78.791
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/198117
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.titlePeaks above the Harrison-Zel'dovich spectrum due to the Quark-Gluon to Hadron Transition
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