Testing an Inflation Model with Nonminimal Derivative Coupling in the Light of Planck 2015 Data
We study the dynamics of a generalized inflationary model in which both the scalar field and its derivatives are coupled with the gravity. We consider a general form of the nonminimal derivative coupling in order to have a complete treatment of the model. By expanding the action up to the second ord...
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| Format: | Article |
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Wiley
2016-01-01
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| Series: | Advances in High Energy Physics |
| Online Access: | http://dx.doi.org/10.1155/2016/1252689 |
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| author | Kourosh Nozari Narges Rashidi |
| author_facet | Kourosh Nozari Narges Rashidi |
| author_sort | Kourosh Nozari |
| collection | DOAJ |
| description | We study the dynamics of a generalized inflationary model in which both the scalar field and its derivatives are coupled with the gravity. We consider a general form of the nonminimal derivative coupling in order to have a complete treatment of the model. By expanding the action up to the second order in perturbation, we study the spectrum of the primordial modes of the perturbations. Also, by expanding the action up to the third order and considering the three-point correlation functions, the amplitude of the non-Gaussianity of the primordial perturbations is studied in both equilateral and orthogonal configurations. Finally, by adopting some sort of potentials, we compare the model in hand with the Planck 2015 released observational data and obtain some constraints on the model’s parameters space. As an important result, we show that the nonminimal couplings help to make models of chaotic inflation that would otherwise be in tension with Planck data, in better agreement with the data. This model is consistent with observation at weak coupling limit. |
| format | Article |
| id | doaj-art-5feb16a9197e4221bbbc9d1441690cbd |
| institution | Kabale University |
| issn | 1687-7357 1687-7365 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in High Energy Physics |
| spelling | doaj-art-5feb16a9197e4221bbbc9d1441690cbd2025-02-03T05:57:34ZengWileyAdvances in High Energy Physics1687-73571687-73652016-01-01201610.1155/2016/12526891252689Testing an Inflation Model with Nonminimal Derivative Coupling in the Light of Planck 2015 DataKourosh Nozari0Narges Rashidi1Department of Physics, Faculty of Basic Sciences, University of Mazandaran, P.O. Box 47416-95447, Babolsar, IranDepartment of Physics, Faculty of Basic Sciences, University of Mazandaran, P.O. Box 47416-95447, Babolsar, IranWe study the dynamics of a generalized inflationary model in which both the scalar field and its derivatives are coupled with the gravity. We consider a general form of the nonminimal derivative coupling in order to have a complete treatment of the model. By expanding the action up to the second order in perturbation, we study the spectrum of the primordial modes of the perturbations. Also, by expanding the action up to the third order and considering the three-point correlation functions, the amplitude of the non-Gaussianity of the primordial perturbations is studied in both equilateral and orthogonal configurations. Finally, by adopting some sort of potentials, we compare the model in hand with the Planck 2015 released observational data and obtain some constraints on the model’s parameters space. As an important result, we show that the nonminimal couplings help to make models of chaotic inflation that would otherwise be in tension with Planck data, in better agreement with the data. This model is consistent with observation at weak coupling limit.http://dx.doi.org/10.1155/2016/1252689 |
| spellingShingle | Kourosh Nozari Narges Rashidi Testing an Inflation Model with Nonminimal Derivative Coupling in the Light of Planck 2015 Data Advances in High Energy Physics |
| title | Testing an Inflation Model with Nonminimal Derivative Coupling in the Light of Planck 2015 Data |
| title_full | Testing an Inflation Model with Nonminimal Derivative Coupling in the Light of Planck 2015 Data |
| title_fullStr | Testing an Inflation Model with Nonminimal Derivative Coupling in the Light of Planck 2015 Data |
| title_full_unstemmed | Testing an Inflation Model with Nonminimal Derivative Coupling in the Light of Planck 2015 Data |
| title_short | Testing an Inflation Model with Nonminimal Derivative Coupling in the Light of Planck 2015 Data |
| title_sort | testing an inflation model with nonminimal derivative coupling in the light of planck 2015 data |
| url | http://dx.doi.org/10.1155/2016/1252689 |
| work_keys_str_mv | AT kouroshnozari testinganinflationmodelwithnonminimalderivativecouplinginthelightofplanck2015data AT nargesrashidi testinganinflationmodelwithnonminimalderivativecouplinginthelightofplanck2015data |