Constraints on just enough inflation preceded by a thermal era

@article{Das2016ConstraintsOJ,
  title={Constraints on just enough inflation preceded by a thermal era},
  author={Suratna Das and Gaurav Goswami and Jayanti Prasad and Raghavan Rangarajan},
  journal={Physical Review D},
  year={2016},
  volume={93},
  pages={023516}
}
If the inflationary era is preceded by a radiation dominated era in which the inflaton too was in thermal equilibrium at some very early time then the CMB data places an upper bound on the comoving temperature of the (decoupled) inflaton quanta. In addition, if one considers models of "just enough" inflation, where the number of e-foldings of inflation is just enough to solve the horizon and flatness problems, then we get a lower bound on the Hubble parameter during inflation, $H_{\rm inf… 

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References

SHOWING 1-10 OF 21 REFERENCES

The early Universe

In the past few years one of the most exciting areas of research in physics has been the interdisciplinary field of cosmology and particle physics. The NSF's Institute for Theoretical Physics in

and a at

The xishacorene natural products are structurally unique apolar diterpenoids that feature a bicyclo[3.3.1] framework. These secondary metabolites likely arise from the well-studied, structurally

Phys

  • Rev. Lett. 96, 121302
  • 2006

Astropart

  • Phys. 1506, 001
  • 2015

Phys

  • Rev. Lett. 97, 251301
  • 2006

Phys

  • Rev. D 53, 1784
  • 1996

Nucl

  • Phys. B 449, 229
  • 1995

Astropart

  • Phys. 12, 19
  • 2014

Astropart

  • Phys. 1503, 024
  • 2015

Phys

  • Rev. D 48, 439
  • 1993