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arXiv 0903.3473hep-ph
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消灭光生

Annihilating Leptogenesis

Pei-Hong Gu, Utpal Sarkar

摘要:

轻子生成通常通过重粒子的衰变来实现。在这篇文章中,我们考虑通过重粒子的湮灭产生轻子不对称性的另一种可能性。我们证明了我们的想法与一个现实的标准模型包含一个重的双重和一个轻的单重标量除了右手中微子和希格斯三重态所需的类型I +II跷跷板中微子质量的扩展。我们还澄清,这种湮灭leptogenesis方案可以自然地嵌入到更基本的理论,如左右对称模型或大统一理论。

英文摘要:

Leptogenesis is usually realized through decays of heavy particles. In this article we consider another possibility of generating a lepton asymmetry through annihilations of heavy particles. We demonstrate our idea with a realistic extension of the standard model containing a heavy doublet and a light singlet scalars in addition to right-handed neutrinos and Higgs triplets required for type-I+II seesaw of neutrino masses. We also clarify that this annihilating leptogenesis scenario can be naturally embedded in more fundamental theories, like left-right symmetric models or grand unified theories.

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