Singlet portal extensions of the standard seesaw models to dark sector with local dark symmetry: An alternative to the new minimal standard model

Baek, S.; Ko, P.; Park, W.-I.

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PUBDB-2018-02822

Singlet portal extensions of the standard seesaw models to dark sector with local dark symmetry: An alternative to the new minimal standard model

Baek, S. ; Ko, P. (Corresponding author) ; Park, W.-I.

2013
Verlag Deutsches Elektronen-Synchrotron Hamburg
ISBN: 978-3-935702-83-6

Baek, S. "Singlet portal extensions of the standard seesaw models to dark sector with local dark symmetry: An alternative to the new minimal standard model" in Proceedings, 9th Patras Workshop on Axions, WIMPs and WISPs (AXION-WIMP 2013) / Oberlack, Uwe, Sissol, Pierre (eds.), 2013 ; AXION-WIMP 2013 : 9th Patras Workshop on Axions, WIMPs and WISPs , 2013-06-23 - 2013-06-28, Mainz
9th Patras Workshop on Axions, WIMPs and WISPs, AXION-WIMP 2013, Mainz, Germany, 24 Jun 2013 - 28 Jun 2013 Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-PROC 247-251 (2013) [10.3204/DESY-PROC-2013-04/ko_pyungwon]

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Please use a persistent id in citations: doi:10.3204/DESY-PROC-2013-04/ko_pyungwon

Report No.: DESY-PROC-2013-04

Abstract: Assuming dark matter is absolutely stable due to unbroken dark gauge symmetry and singlet operators are portals to the dark sector, we present a simple extension of the standard seesaw model that can accommodate all the cosmological observations as well as terrestrial experiments available as of now, including leptogenesis, extra dark radiation of ∼ 8% (resulting in N eff = 3.130 the effective number of neutrino species), Higgs inflation, small and large scale structure formation, and current relic density of scalar DM (X). The Higgs signal strength is equal to one as in the SM for unbroken U (1)X case with a scalar dark matter, but it could be less than one independent of decay channels if the dark matter is a dark sector fermion or if U (1)X is spontaneously broken, because of a mixing with a new neutral scalar boson in the models.

Keyword(s): Hypothetisches Teilchen

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