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arXiv 1409.8263hep-phastro-ph.CO
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共振光生的味协变形式

Flavour Covariant Formalism for Resonant Leptogenesis

P. S. Bhupal Dev, Peter Millington, Apostolos Pilaftsis, Daniele Teresi

摘要:

我们提出了一个完整的味道协变形式主义的运输现象,并将其应用于研究共振Leptogenesis(RL)的味道动力学。我们表明,这种形式主义提供了一个完整和统一的描述RL,始终占三个不同的物理现象:(i)共振混合和(ii)不同的重中微子味之间的相干振荡,以及(iii)量子退相干效应在带电轻子部门。我们描述了必要的出现在味空间中的高阶张量,所产生的部分自能的么正性削减。最后,在一个共振$τ$ -成因模型,我们说明了这种形式主义的重要性,表明最终轻子的不对称性可以变化多达一个数量级之间的部分风味依赖的治疗,这并不能捕捉所有相关的风味效果。

英文摘要:

We present a fully flavour-covariant formalism for transport phenomena and apply it to study the flavour-dynamics of Resonant Leptogenesis (RL). We show that this formalism provides a complete and unified description of RL, consistently accounting for three distinct physical phenomena: (i) resonant mixing and (ii) coherent oscillations between different heavy-neutrino flavours, as well as (iii) quantum decoherence effects in the charged-lepton sector. We describe the necessary emergence of higher-rank tensors in flavour space, arising from the unitarity cuts of partial self-energies. Finally, within a Resonant $τ$-Genesis model, we illustrate the importance of this formalism by showing that the final lepton asymmetry can vary by as much as an order of magnitude between partially flavour-dependent treatments, which do not capture all of the pertinent flavour effects.

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