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  Conformal standard model with an extended scalar sector

Latosinski, A., Lewandowski, A., Meissner, K., & Nicolai, H. (2015). Conformal standard model with an extended scalar sector. Journal of high energy physics: JHEP, 2015(10): 170. doi:10.1007/JHEP10(2015)170.

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 Urheber:
Latosinski, Adam1, Autor
Lewandowski, Adrian, Autor
Meissner, Krzysztof2, Autor           
Nicolai, Hermann2, Autor           
Affiliations:
1Max-Planck-Institut für Gravitationsphysik, ou_persistent22              
2Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24014              

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Schlagwörter: High Energy Physics - Phenomenology, hep-ph
 Zusammenfassung: We present an extended version of the Conformal Standard Model (characterized by the absence of any new intermediate scales between the electroweak scale and the Planck scale) with an enlarged scalar sector coupling to right-chiral neutrinos in such a way that the scalar potential and the Yukawa couplings involving only right-chiral neutrinos are invariant under a new global symmetry SU(3)$_N$ which is broken explicitly only by the Yukawa interaction coupling right-chiral neutrinos and the electroweak lepton doublets. We point out four main advantages of such an enlargement, namely: (1) the economy of the (non-supersymmetric) Standard Model, and thus its observational success, is preserved; (2) thanks to the enlarged scalar sector the RG improved one-loop effective potential is everywhere positive with a stable global minimum, thereby avoiding the notorious instability of the Standard Model vacuum; (3) the pseudo-Goldstone bosons resulting from spontaneous breaking of the SU(3)$_N$ symmetry are natural Dark Matter candidates with calculable small masses and couplings; and (4) the Majorana Yukawa coupling matrix acquires a form naturally adapted to leptogenesis. The model is made perturbatively consistent up to the Planck scale by imposing the vanishing of quadratic divergences at the Planck scale. Observable consequences of the model occur mainly via the mixing of the new scalars and the standard model Higgs boson.

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 Datum: 2015-07-0720152015
 Publikationsstatus: Erschienen
 Seiten: 35 pages, 1 figure
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 Identifikatoren: arXiv: 1507.01755
DOI: 10.1007/JHEP10(2015)170
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Titel: Journal of high energy physics : JHEP
Genre der Quelle: Zeitschrift
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Affiliations:
Ort, Verlag, Ausgabe: Bologna, Italy : Società italiana di fisica
Seiten: - Band / Heft: 2015 (10) Artikelnummer: 170 Start- / Endseite: - Identifikator: ISSN: 1126-6708
CoNE: https://pure.mpg.de/cone/journals/resource/111021927548002