Primordial Lepton Family Asymmetries in Seesaw Model

By T. Endoh, T. Morozumi, Zhaohua Xiong. 2003

137 citations recorded by the source corpus.

In the leptogenesis scenario, decays of heavy Majorana neutrinos generate lepton family asymmetries, Ye ,Y µ and Yτ. These asymmetries are sensitive to CP violating phases in seesaw models. The time evolution of the lepton family asymmetries is derived by solving Boltzmann equations. Considering a minimal seesaw model, we show how each family asymmetry varies with one particular CP violating phase. For instance, we find the case in which the lepton asymmetry is dominated by Yµ or Yτ, depending on the choice of the CP violating phase. We also find the case in which the signs of the lepton family asymmetries Yµ and Yτ are opposite. Their absolute values can be larger than the total lepton asymmetry, and baryon asymmetry may result from the cancellation of the lepton family asymmetries.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/48696375255bd8b59bd47441a593c255d7c0130b

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Nuclear and High Energy Physics

1. E. Nardi
2. D. Bodeker
3. W. Buchmuller
4. C. S. Fong
5. A. Riotto
6. M. Drewes
7. Z. Xing
8. D. Seery

Citations in the corpus

• Leptogenesis in the Universe (2012, background): “[68, 69, 70] they had been included in leptogenesis studies only in a few cases [71, 72, 73, 74, 75].”
• Baryogenesis from the weak scale to the grand unification scale (2020, background): “In general, flavor effects can have an important impact on leptogenesis (Barbieri et al., 2000; Endoh et al., 2004; Abada et al., 2006; Nardi et al., 2006b; Blanchet et al., 2007).”
• Leptogenesis (2008, unknown): “The first “flavored” analysis appears in [44], and detailed Boltzmann equations are presented in [45].”