Inflation beyond T-models and primordial B-modes

Yi Fu Cai, Jinn Ouk Gong, Shi Pi

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18 Scopus citations


We describe extended theories which shares the gauge transformation symmetry of the T-models, and takes the T-models as well as Starobinsky model as special cases. We derive a general relation between the two slow-roll parameters, and find that a large class of models can be embedded. Such models include more general Starobinsky-like inflation as well as the chaotic inflation with a large tensor-to-scalar ratio consistent with the BICEP2 result.

Original languageEnglish
Pages (from-to)20-24
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
StatePublished - 10 Nov 2014

Bibliographical note

Funding Information:
We thank Frederico Arroja, Qing-Guo Huang, Takahiro Tanaka and Yingli Zhang for useful discussions. We acknowledge the workshop “New Perspectives on Cosmology” at the Asia Pacific Center for Theoretical Physics where part of this work was carried out. The work of Y.F.C. is supported in part by NSERC and by funds from the Canada Research Chairs Program. J.G. acknowledges the Max-Planck-Gesellschaft , the Korea Ministry of Education, Science and Technology , Gyeongsangbuk-Do and Pohang City for the support of the Independent Junior Research Group at the Asia Pacific Center for Theoretical Physics. J.G. is also supported by a Starting Grant through the Basic Science Research Program of the National Research Foundation of Korea ( 2013R1A1A1006701 ). S.P. thanks the GCOE Bilateral International Exchange Program of Kyoto University and the hospitality of the Yukawa Institute for Theoretical Physics at Kyoto University for his visit.

Publisher Copyright:
© 2014 The Authors.


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