Browsing by Author "Korutlu, Beste"

Dark matter from conformal sectors

Demir, Durmuş Ali; Frank, Mariana; Korutlu, Beste (Elsevier, 2014)

We show that a conformal-invariant dark sector, interacting conformally with the Standard Model (SM) fields through the Higgs portal, provides a viable framework where cold dark matter (CDM) and invisible Higgs decays can ...

Effects of a real singlet scalar on Veltman condition

Karahan, Canan Nurhan; Korutlu, Beste (Elsevier, 2014-05)

We revisit the fine-tuning problem in the Standard Model (SM) and show the modification in the Veltman condition by virtue of a minimally-extended particle spectrum with one real SM gauge singlet scalar field. We demand ...

Hidden spin-3/2 field in the standard model

Demir, Durmuş Ali; Karahan, Canan; Korutlu, Beste; Sargın, Ozan (Springer, 2017-09)

Here we show that a massive spin-3/2 field can hide in the SM spectrum in a way revealing itself only virtually. We study collider signatures and loop effects of this field, and determine its role in Higgs inflation and ...

Higgsed Stueckelberg vector and Higgs quadratic divergence

Demir, Durmuş Ali; Karahan, Canan Nurhan; Korutlu, Beste (Elsevier, 2015-01-05)

Here we show that, a hidden vector field whose gauge invariance is ensured by a Stueckelberg scalar and whose mass is spontaneously generated by the Standard Model Higgs field contributes to quadratic divergences in the ...

Softly fine-tuned Standard Model and the scale of inflation

Korutlu, Beste (World Scientific Publishing, 2015-11)

The direct coupling between the Higgs field and the spacetime curvature, if finely tuned, is known to stabilize the Higgs boson mass. The fine-tuning is soft because the Standard Model (SM) parameters are subject to no ...