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arXiv · hep-ph/0112069

Quintessence and Spontaneous Leptogenesis

Mingzhe Li·Xiulian Wang·Bo Feng·Xinmin Zhang
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Abstract

We propose in this paper a scenario of spontaneous baryogenesis in cosmological models of Quintessence by introducing a derivative coupling of the Quintessence scalar $Q$ to the baryon current $J_B^μ$ or the current of the baryon number minus lepton number $J_{B-L}^μ$. We find that with a dimension-5 operator ${\partial_μQ} J_{B-L}^μ$ suppressed by the Planck mass $M_{pl}$ or the Grand Unification Scale $M_{GUT}$, baryon number asymmetry $n_B/s \sim 10^{-10}$ can be naturally explained {\it via} leptogenesis. We study also the isocurvature baryon number fluctuation generated in our model.

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Mingzhe Li, Xiulian Wang, Bo Feng, Xinmin Zhang. 2001-12-05. Quintessence and Spontaneous Leptogenesis. https://doi.org/10.1103/physrevd.65.103511

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