Dynamical origin of the electroweak scale and the 125 GeV scalar

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dc.contributor.author Di Chiara, Stefano
dc.contributor.author Foadi, Roshan
dc.contributor.author Tuominen, Kimmo
dc.contributor.author Tähtinen, Sara
dc.date.accessioned 2016-01-15T13:14:02Z
dc.date.available 2016-01-15T13:14:02Z
dc.date.issued 2015-11
dc.identifier.citation Di Chiara , S , Foadi , R , Tuominen , K & Tähtinen , S 2015 , ' Dynamical origin of the electroweak scale and the 125 GeV scalar ' , Nuclear Physics, Section B , vol. 900 , pp. 295-330 . https://doi.org/10.1016/j.nuclphysb.2015.09.013
dc.identifier.other PURE: 56823079
dc.identifier.other PURE UUID: e4f6e4c9-827b-4eaa-904d-3989f9f89911
dc.identifier.other WOS: 000364323000012
dc.identifier.other Scopus: 84943615966
dc.identifier.other ORCID: /0000-0003-4077-6893/work/31523897
dc.identifier.uri http://hdl.handle.net/10138/159442
dc.description.abstract We consider a fully dynamical origin for the masses of weak gauge bosons and heavy quarks of the Standard Model. Electroweak symmetry breaking and the gauge boson masses arise from new strong dynamics, which leads to the appearance of a composite scalar in the spectrum of excitations. In order to generate mass for the Standard Model fermions, we consider extended gauge dynamics, effectively represented by four fermion interactions at presently accessible energies. By systematically treating these interactions, we show that they lead to a large reduction of the mass of the scalar resonance. Therefore, interpreting the scalar as the recently observed 125 GeV state implies that the mass originating solely from new strong dynamics can be much heavier, i.e. of the order of 1 TeV. In addition to reducing the mass of the scalar resonance, we show that the four-fermion interactions allow for contributions to the oblique corrections in agreement with the experimental constraints. The couplings of the scalar resonance with the Standard Model gauge bosons and fermions are evaluated, and found to be compatible with the current LHC results. Additional new resonances are expected to be heavy, with masses of the order of a few TeVs, and hence accessible in future experiments. (C) 2015 The Authors. Published by Elsevier B.V. en
dc.format.extent 36
dc.language.iso eng
dc.relation.ispartof Nuclear Physics, Section B
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject SYMMETRY-BREAKING
dc.subject STANDARD MODEL
dc.subject LHC
dc.subject BOSON
dc.subject MASS
dc.subject 114 Physical sciences
dc.title Dynamical origin of the electroweak scale and the 125 GeV scalar en
dc.type Article
dc.contributor.organization Helsinki Institute of Physics
dc.contributor.organization Department of Physics
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1016/j.nuclphysb.2015.09.013
dc.relation.issn 0550-3213
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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