OC1 - Primordial Gravitational Waves and the CMB |
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Speaker |
Alexander, Stephon |
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Talk Title |
Can we Probe Leptogenesis from Inflationary Primordial Birefringent Gravitational Waves? |
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Abstract |
In this talk I discuss a generic mechanism for generating the observed baryon (lepton) asymmetry from inflationary birefringent gravitational waves; proposed by Alexander, Peskin and Sheihk-Jabari. These gravity waves are generated by a CP violating phase of the Inflaton field that couples to a gravitational Chern-Simons term (Chern-Simons gravity). These gravitational waves lead to unique parity violating cross correlations in the CMB polarization spectrum which was pointed out by Lue, Wang and Kamionkoswi. I will also discuss, the viability of detecting such gravitational waves and hence constraining this inflationary leptogenesis mechanism. |
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