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High Energy Physics - Phenomenology

arXiv:1812.10099 (hep-ph)
[Submitted on 25 Dec 2018 (v1), last revised 18 Feb 2020 (this version, v3)]

Title:On the violent preheating in the mixed Higgs-$R^2$ inflationary model

Authors:Minxi He, Ryusuke Jinno, Kohei Kamada, Seong Chan Park, Alexei A. Starobinsky, Jun'ichi Yokoyama
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Abstract:It has been argued that the mixed Higgs-$R^2$ model acts as the UV extension of the Higgs inflation, pushing up its cut-off scale in the vacuum close up to the Planck scale. In this letter, we study the inflaton oscillation stage after inflation, focusing on the effective mass of the phase direction of the Higgs field, which can cause a violent preheating process. We find that the "spikes" in the effective mass of the phase direction observed in the Higgs inflation still appear in the mixed Higgs-$R^2$ model. While the spikes appear above the cut-off scale in the Higgs-only case, they appear below the cut-off scale when the model is extended with $R^2$ term though reheating cannot be completed in the violent particle production regime since the spikes get milder.
Comments: 16 pages, 14 figures, typo of a parameter corrected, conclusion remains unchanged
Subjects: High Energy Physics - Phenomenology (hep-ph); Cosmology and Nongalactic Astrophysics (astro-ph.CO); General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Theory (hep-th)
Report number: CTPU-PTC-18-43, LDU-18-007, RESCEU-16/18
Cite as: arXiv:1812.10099 [hep-ph]
  (or arXiv:1812.10099v3 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.1812.10099
Journal reference: Phys. Lett. B 791 (2019) 36-42
Related DOI: https://doi.org/10.1016/j.physletb.2019.02.008

Submission history

From: Minxi He [view email]
[v1] Tue, 25 Dec 2018 12:50:58 UTC (1,353 KB)
[v2] Sat, 29 Dec 2018 15:38:52 UTC (1,353 KB)
[v3] Tue, 18 Feb 2020 04:26:33 UTC (1,353 KB)
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