تقرير
Higgs inflation in metric and Palatini formalisms: Required suppression of higher dimensional operators
| العنوان: | Higgs inflation in metric and Palatini formalisms: Required suppression of higher dimensional operators |
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| المؤلفون: | Jinno, Ryusuke, Kubota, Mio, Oda, Kin-ya, Park, Seong Chan |
| المصدر: | JCAP 03 (2020) 063 |
| سنة النشر: | 2019 |
| المجموعة: | Astrophysics High Energy Physics - Phenomenology High Energy Physics - Theory |
| مصطلحات موضوعية: | High Energy Physics - Phenomenology, Astrophysics - Cosmology and Nongalactic Astrophysics, High Energy Physics - Theory |
| الوصف: | We investigate the sensitivity of Higgs(-like) inflation to higher dimensional operators in the nonminimal couplings and in the potential, both in the metric and Palatini formalisms. We find that, while inflationary predictions are relatively stable against the higher dimensional operators around the attractor point in the metric formalism, they are extremely sensitive in the Palatini one: for the latter, inflationary predictions are spoiled by $|\xi_4| \gtrsim 10^{-6}$ in the nonminimal couplings $(\xi_2 \phi^2 + \xi_4 \phi^4 + \cdots)R$, or by $|\lambda_6| \gtrsim 10^{-16}$ in the Jordan-frame potential $\lambda_4 \phi^4 + \lambda_6 \phi^6 + \cdots$ (both in Planck units). This extreme sensitivity results from the absence of attractor in the Palatini formalism. Our study underscores the challenge of realizing inflationary models with the nonminimal coupling in the Palatini formalism. Comment: 29 pages, 10 figures; minor typo correction; references added |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1088/1475-7516/2020/03/063 |
| URL الوصول: | http://arxiv.org/abs/1904.05699 |
| رقم الأكسشن: | edsarx.1904.05699 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1088/1475-7516/2020/03/063 |
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