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Article: Quark-hadron phase transitions in brane-world cosmologies

TitleQuark-hadron phase transitions in brane-world cosmologies
Authors
Issue Date2008
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/nuclphysb
Citation
Nuclear Physics B, 2008, v. 805 n. 1-2, p. 190-206 How to Cite?
AbstractWhen the universe was about 10 μs old, a first order cosmological quark-hadron phase transition occurred at a critical temperature of around 200 MeV. In this work, we study the quark-hadron phase transition in the context of brane-world cosmologies, in which our Universe is a three-brane embedded in a five-dimensional bulk, and within an effective model of QCD. We analyze the evolution of the physical quantities, relevant for the physical description of the early universe, namely, the energy density, temperature and scale factor, before, during, and after the phase transition. To study the cosmological dynamics and evolution we use both analytical and numerical methods. In particular, due to the high energy density in the early Universe, we consider in detail the specific brane world model case of neglecting the terms linearly proportional to the energy density with respect to the quadratic terms. A small brane tension and a high value of the dark radiation term tend to decrease the effective temperature of the quark-gluon plasma and of the hadronic fluid, respectively, and to significantly accelerate the transition to a pure hadronic phase. By assuming that the phase transition may be described by an effective nucleation theory, we also consider the case where the Universe evolved through a mixed phase with a small initial supercooling and monotonically growing hadronic bubbles. © 2008 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/91866
ISSN
2015 Impact Factor: 3.735
2015 SCImago Journal Rankings: 2.024
ISI Accession Number ID
Funding AgencyGrant Number
I.N.F.N
government of the Hong Kong SARHKU 702507P
Fundacao para a Ciencia e Tecnologia (FCT)-PortugalSFRH/BPD/26269/2006
Funding Information:

We would like to thank the anonymous referee, whose comments and suggestions helped us to significantly improve the manuscript. The work of G.D.R. is supported by I.N.F.N. The work of T.H. is supported by the RGC grant HKU 702507P of the government of the Hong Kong SAR. F.S.N.L. was funded by Fundacao para a Ciencia e Tecnologia (FCT)-Portugal through the grant SFRH/BPD/26269/2006.

References
Grants

 

DC FieldValueLanguage
dc.contributor.authorDe Risi, Gen_HK
dc.contributor.authorHarko, Ten_HK
dc.contributor.authorLobo, FSNen_HK
dc.contributor.authorPun, CSJen_HK
dc.date.accessioned2010-09-17T10:28:54Z-
dc.date.available2010-09-17T10:28:54Z-
dc.date.issued2008en_HK
dc.identifier.citationNuclear Physics B, 2008, v. 805 n. 1-2, p. 190-206en_HK
dc.identifier.issn0550-3213en_HK
dc.identifier.urihttp://hdl.handle.net/10722/91866-
dc.description.abstractWhen the universe was about 10 μs old, a first order cosmological quark-hadron phase transition occurred at a critical temperature of around 200 MeV. In this work, we study the quark-hadron phase transition in the context of brane-world cosmologies, in which our Universe is a three-brane embedded in a five-dimensional bulk, and within an effective model of QCD. We analyze the evolution of the physical quantities, relevant for the physical description of the early universe, namely, the energy density, temperature and scale factor, before, during, and after the phase transition. To study the cosmological dynamics and evolution we use both analytical and numerical methods. In particular, due to the high energy density in the early Universe, we consider in detail the specific brane world model case of neglecting the terms linearly proportional to the energy density with respect to the quadratic terms. A small brane tension and a high value of the dark radiation term tend to decrease the effective temperature of the quark-gluon plasma and of the hadronic fluid, respectively, and to significantly accelerate the transition to a pure hadronic phase. By assuming that the phase transition may be described by an effective nucleation theory, we also consider the case where the Universe evolved through a mixed phase with a small initial supercooling and monotonically growing hadronic bubbles. © 2008 Elsevier B.V. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/nuclphysben_HK
dc.relation.ispartofNuclear Physics Ben_HK
dc.titleQuark-hadron phase transitions in brane-world cosmologiesen_HK
dc.typeArticleen_HK
dc.identifier.emailHarko, T: harko@hkucc.hku.hken_HK
dc.identifier.emailPun, CSJ: jcspun@hkucc.hku.hken_HK
dc.identifier.authorityHarko, T=rp01333en_HK
dc.identifier.authorityPun, CSJ=rp00772en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.nuclphysb.2008.07.012en_HK
dc.identifier.scopuseid_2-s2.0-50549102488en_HK
dc.identifier.hkuros150861-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-50549102488&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume805en_HK
dc.identifier.issue1-2en_HK
dc.identifier.spage190en_HK
dc.identifier.epage206en_HK
dc.identifier.isiWOS:000260020200011-
dc.publisher.placeNetherlandsen_HK
dc.relation.projectHigh energy radiation, accretion and cooling of strange stars-
dc.identifier.scopusauthoridDe Risi, G=8253611900en_HK
dc.identifier.scopusauthoridHarko, T=7006485783en_HK
dc.identifier.scopusauthoridLobo, FSN=7007134803en_HK
dc.identifier.scopusauthoridPun, CSJ=7003931846en_HK

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