TY  - JOUR
AU  - Kim, J.
AU  - Ko, P.
AU  - Park, W. I.
PY  - 2017
DA  - 2017//
TI  - Higgs-portal assisted Higgs inflation with a sizeable tensor-to-scalar ratio
T2  - J. Cosmol. Astropart. Phys.
JO  - Journal of Cosmology and Astroparticle Physics
SP  - 003
EP  - 16pp
VL  - 02
IS  - 2
PB  - Iop Publishing Ltd
KW  - inflation
KW  - particle physics – cosmology connection
KW  - physics of the early universe
AB  - We show that the Higgs portal interactions involving extra dark Higgs field can save generically the original Higgs inflation of the standard model (SM) from the problem of a deep non-SM vacuum in the SM Higgs potential. Specifically, we show that such interactions disconnect the top quark pole mass from inflationary observables and allow multi-dimensional parameter space to save the Higgs inflation, thanks to the additional parameters (the dark Higgs boson mass m(phi), the mixing angle a between the SM Higgs H and dark Higgs Phi, and the mixed quartic coupling) affecting RG-running of the Higgs quartic coupling. The effect of Higgs portal interactions may lead to a larger tensor-to-scalar ratio, 0.08 less than or similar to r less than or similar to 0.1, by adjusting relevant parameters in wide ranges of alpha and m(phi), some region of which can be probed at future colliders. Performing a numerical analysis we find an allowed region of parameters, matching the latest Planck data.
SN  - 1475-7516
UR  - http://arxiv.org/abs/1405.1635
UR  - https://doi.org/10.1088/1475-7516/2017/02/003
DO  - 10.1088/1475-7516/2017/02/003
LA  - English
N1  - WOS:000399455000003
ID  - Kim_etal2017
ER  -