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The Higgs boson can delay reheating after inflation
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA. Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA.;Stockholm Univ, Oskar Klein Ctr Cosmoparticle Phys, Dept Phys, S-10691 Stockholm, Sweden;Stockholm Univ, Roslagstullsbacken 23, S-10691 Stockholm, Sweden.
Univ Illinois, Dept Phys, Urbana, IL 61801 USA.;Nikhef, Sci Pk 105, NL-1098 XG Amsterdam, Netherlands.;Leiden Univ, Inst Lorentz Theoret Phys, NL-2333 CA Leiden, Netherlands..
Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA.;Stockholm Univ, Oskar Klein Ctr Cosmoparticle Phys, Dept Phys, S-10691 Stockholm, Sweden..
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA. Stockholm Univ, Oskar Klein Ctr Cosmoparticle Phys, Dept Phys, S-10691 Stockholm, Sweden;Stockholm Univ, Roslagstullsbacken 23, S-10691 Stockholm, Sweden.
2018 (English)In: Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, E-ISSN 1475-7516, no 5, article id 067Article in journal (Refereed) Published
Abstract [en]

The Standard Model Higgs boson, which has previously been shown to develop an effective vacuum expectation value during inflation, can give rise to large particle masses during inflation and reheating, leading to temporary blocking of the reheating process and a lower reheat temperature after inflation. We study the effects on the multiple stages of reheating: resonant particle production (preheating) as well as perturbative decays from coherent oscillations of the inflaton field. Specifically, we study both the cases of the inflaton coupling to Standard Model fermions through Yukawa interactions as well as to Abelian gauge fields through a Chern-Simons term. We find that, in the case of perturbative inflaton decay to SM fermions, reheating can be delayed due to Higgs blocking and the reheat temperature can decrease by up to an order of magnitude. In the case of gauge-reheating, Higgs-generated masses of the gauge fields can suppress preheating even for large inflatongauge couplings. In extreme cases, preheating can be shut down completely and must be substituted by perturbative decay as the dominant reheating channel. Finally, we discuss the distribution of reheat temperatures in different Hubble patches, arising from the stochastic nature of the Higgs VEV during inflation and its implications for the generation of both adiabatic and isocurvature fluctuations.

Place, publisher, year, edition, pages
IOP PUBLISHING LTD , 2018. no 5, article id 067
Keywords [en]
inflation, particle physics, cosmology connection, physics of the early universe
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:kth:diva-231233DOI: 10.1088/1475-7516/2018/05/067ISI: 000433476800004Scopus ID: 2-s2.0-85048082932OAI: oai:DiVA.org:kth-231233DiVA, id: diva2:1228124
Note

QC 20180627

Available from: 2018-06-27 Created: 2018-06-27 Last updated: 2018-06-27Bibliographically approved

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