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Gravitational waves from oscillon preheating

Zhou, Shuang-Yong; Copeland, Edmund J.; Easther, Richard; Finkel, Hal; Mou, Zong-Gang; Saffin, Paul M.

Authors

Shuang-Yong Zhou

Edmund J. Copeland

Richard Easther

Hal Finkel

Zong-Gang Mou



Abstract

Oscillons are long-lived, localized excitations of nonlinear scalar fields which may be copiously produced during preheating after inflation, leading to a possible oscillon-dominated phase in the early Universe. For example, this can happen after axion monodromy inflation, on which we run our simulations. We investigate the stochastic gravitational wave background associated with an oscillon-dominated phase. An isolated oscillon is spherically symmetric and does not radiate gravitational waves, and we show that the flux of gravitational radiation generated between oscillons is also small. However, a significant stochastic gravitational wave background may be generated during preheating itself (i.e, when oscillons are forming), and in this case the characteristic size of the oscillons is imprinted on the gravitational wave power spectrum, which has multiple, distinct peaks.

Citation

Zhou, S., Copeland, E. J., Easther, R., Finkel, H., Mou, Z., & Saffin, P. M. (2013). Gravitational waves from oscillon preheating. Journal of High Energy Physics, 2013, https://doi.org/10.1007/JHEP10%282013%29026

Journal Article Type Article
Acceptance Date Aug 29, 2013
Publication Date Oct 3, 2013
Deposit Date Apr 24, 2017
Publicly Available Date Apr 24, 2017
Journal Journal of High Energy Physics
Electronic ISSN 1029-8479
Publisher Springer Verlag
Peer Reviewed Peer Reviewed
Volume 2013
Article Number 26
DOI https://doi.org/10.1007/JHEP10%282013%29026
Keywords Cosmology of Theories beyond the SM, Solitons Monopoles and Instantons, Nonperturbative Effects
Public URL http://eprints.nottingham.ac.uk/id/eprint/42150
Publisher URL http://link.springer.com/article/10.1007%2FJHEP10%282013%29026
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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