Corpus ID: 220546325

Renormalization in gravitational leptogenesis with pseudo-scalar-tensor coupling

@inproceedings{Kamada2020RenormalizationIG,
  title={Renormalization in gravitational leptogenesis with pseudo-scalar-tensor coupling},
  author={Kohei Kamada and Jun’ya Kume and Yusuke Yamada},
  year={2020}
}
We consider the renormalization in the pseudo-scalar inflation models with the gravitational Chern-Simons term. In this model, lepton asymmetry is generated from the chiral gravitational waves produced due to the Chern-Simons term through the gravitational chiral anomaly. However, it is known that the naive estimate of the expectation value of the gravitational Chern-Pontryagin density as well as the resultant lepton number density depend on the UV-cutoff scale, which raises a question on their… CONTINUE READING

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