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arXiv 1803.08239hep-ph
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用leptogenesis重新审视正常层次中微子质量模型

Normal hierarchy neutrino mass model revisited with leptogenesis

Ananya Mukherjee, Mrinal Kumar Das, Jayanta Kumar Sarma

摘要:

我们在$A_4$味对称框架下研究了中微子质量起源为I型跷跷板的通过轻子生成重子的方案。由于第五代右手中微子的存在,该模型自然产生非零反应堆混合角。我们已经考虑了额外的黄酮$η$的两个vev对齐,并详细研究了后果。作为一个整体,额外的flavon以及额外的右手中微子,使我们能够研究热leptogenesis的最轻的右手中微子在模型中存在的衰变。通过考虑一个相当宽的右手中微子质量范围,我们计算了味依赖和味独立的leptogenesis的物质-反物质不对称性。最后,我们关联了宇宙的重子不对称性(BAU)与模型参数和轻中微子质量。

英文摘要:

We have studied the scenario of baryogenesis via leptogenesis in an $A_4$ flavor symmetric framework considering type I seesaw as the origin of neutrino mass. Because of the presence of the fifth generation right handed neutrino the model naturally generates non-zero reactor mixing angle. We have considered two vev alignments for the extra flavon $η$ and studied the consequences in detail. As a whole the additional flavon along with the extra right handed neutrinos allow us to study thermal leptogenesis by the decay of the lightest right handed neutrino present in the model. We have computed the matter-antimatter asymmetry for both flavor dependent and flavor independent leptogenesis by considering a considerably wider range of right handed neutrino mass. Finally, we correlate the baryon asymmetry of the universe (BAU) with the model parameters and light neutrino masses.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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