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Do current data prefer a nonminimally coupled inflaton?
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Do current data prefer a nonminimally coupled inflaton?
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| dc.contributor.author | Boubekeur, Lotfi | |
| dc.contributor.author | Giusarma, Elena | |
| dc.contributor.author | Mena Requejo, Olga | |
| dc.contributor.author | Ramírez Rodríguez, Héctor Ariel | |
| dc.date.accessioned | 2016-11-18T11:11:03Z | |
| dc.date.available | 2016-11-18T11:11:03Z | |
| dc.date.issued | 2015 | |
| dc.identifier.citation | Boubekeur, Lotfi Giusarma, Elena Mena Requejo, Olga Ramírez Rodríguez, Héctor 2015 Do current data prefer a nonminimally coupled inflaton? Physical Review D 91 10 103004 | |
| dc.identifier.uri | http://hdl.handle.net/10550/56114 | |
| dc.description.abstract | We examine the impact of a nonminimal coupling of the inflaton to the Ricci scalar, 1/2 xi R phi(2), on the inflationary predictions. Such a nonminimal coupling is expected to be present in the inflaton Lagrangian on fairly general grounds. As a case study, we focus on the simplest inflationary model governed by the potential V proportional to phi(2), using the latest combined 2015 analysis of Planck and the BICEP2/Keck Array. We find that the presence of a coupling xi is favored at a significance of 99% C.L., assuming that nature has chosen the potential V proportional to phi(2) to generate the primordial perturbations and a number of e-foldings N = 60. Within the context of the same scenario, we find that the value of xi is different from zero at the 2 sigma level. When considering the cross-correlation polarization spectra from the BICEP2/Keck Array and Planck, a value of r = 0.038(-0.030)(+0.039) is predicted in this particular nonminimally coupled scenario. Future cosmological observations may therefore test these values of r and verify or falsify the nonminimally coupled model explored here. | |
| dc.language.iso | eng | |
| dc.relation.ispartof | Physical Review D, 2015, vol. 91, num. 10, p. 103004 | |
| dc.subject | Física | |
| dc.title | Do current data prefer a nonminimally coupled inflaton? | |
| dc.type | journal article | es_ES |
| dc.date.updated | 2016-11-18T11:11:03Z | |
| dc.identifier.doi | 10.1103/PhysRevD.91.103004 | |
| dc.identifier.idgrec | 108166 | |
| dc.rights.accessRights | open access | es_ES |
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