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Reheating constraints on modified quadratic chaotic inflation

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Abstract

The reheating era of inflationary universe can be parameterized by various parameters like reheating temperature \(T_{\text {re}}\), reheating duration \(N_{\text {re}}\) and average equation of state parameter \({\overline{\omega }}_{\text {re}}\), which can be constrained by observationally feasible values of scalar power spectral amplitude \(A_{\text {s}}\) and spectral index \(n_{\text {s}}\). In this work, by considering the quadratic chaotic inflationary potential with logarithmic correction in mass, we examine the reheating era in order to place some limits on model’s parameter space. By investigating the reheating epoch using Planck 2018+BK18+BAO data, we show that even a small correction can make the quadratic chaotic model consistent with latest cosmological observations. We also find that the study of reheating era helps to put much tighter constraints on model and effectively improves accuracy of model.

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Data Availability Statement

All data generated or analyzed during this study can be derived using the content provided in the article.

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Acknowledgements

SY would like to acknowledge the Ministry of Education, Government of India, for providing fellowship. UAY acknowledges support from an Institute Chair Professorship of IIT Bombay.

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Authors and Affiliations

  1. Department of Physics, Malaviya National Institute of Technology Jaipur, Jaipur, 302017, India

    Sudhava Yadav & K. K. Venkataratnam

  2. Department of Physics, National Institute of Technology Puducherry, Karaikal, 609609, India

    Rajesh Goswami

  3. Department of Physics, Indian Institute of Technology Bombay, Mumbai, 400076, India

    Urjit A. Yajnik

  4. Department of Physics, Indian Institute of Technology Gandhinagar, Gandhinagar, 382055, India

    Urjit A. Yajnik

Authors
  1. Sudhava Yadav
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  2. Rajesh Goswami
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  3. K. K. Venkataratnam
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  4. Urjit A. Yajnik
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Contributions

Sudhava Yadav has done all the calculation and data analysis and prepared first manuscript draft. Rajesh Goswami helped in analysis and deriving the conclusion. K. K. Venkataratnam has supervised the whole work, and Urjit A. Yajnik has given his valuable reviews to prepare the final draft.

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Correspondence to K. K. Venkataratnam.

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Yadav, S., Goswami, R., Venkataratnam, K.K. et al. Reheating constraints on modified quadratic chaotic inflation. Eur. Phys. J. Plus 139, 185 (2024). https://doi.org/10.1140/epjp/s13360-024-04979-6

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