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Heavy Light Inflaton and Dark Matter Production
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Heavy Light Inflaton and Dark Matter Production
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We study the minimal extension of the SM by a scalar with quartic interaction serving as an inflaton. For the model where scale symmetry is broken only in the inflaton sector, the mass of the inflaton is constrained to be relatively low. Here, we analysed the previously omitted situation of the inflaton masses $m_{\chi}\gtrsim 250\text{ GeV}$. Therefore, we provide a window of inflaton masses with viable inflationary properties that evade direct observational constraints, due to their small mixing with the Higgs sector. The addition of heavy neutral leptons with Majorana masses induced by the interaction with the inflaton allow for Cold Dark Matter in the model with masses $O(1-10)\text{ MeV}$.
Forward citations
Cited by 1 Pith paper
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Status of light inflaton: from inflation to laboratory
A sub-10 GeV Higgs-mixed inflaton fits ACT inflation data only if a free loop-correction parameter is tuned, and its surviving mass–mixing window is testable by SHiP, FASER2, and MATHUSLA.
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