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2016

Gauss-Bonnet Gravitational Baryogenesis

Odintsov, S. D., Oikonomou, V. K.

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In this letter we study some variant forms of gravitational baryogenesis by using higher order terms containing the partial derivative of the Gauss-Bonnet scalar coupled to the baryonic current.

This scenario extends the well known theory that uses a similar coupling between the Ricci scalar and the baryonic current.
One appealing feature of the scenario we study is that the predicted baryon asymmetry during a radiation domination era is non-zero.
We calculate the baryon to entropy ratio for the Gauss-Bonnet term and by using the observational constraints we investigate which are the allowed forms of the $R+F(\mathcal{G})$ gravity controlling the evolution.

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