Leptogenesis and composite heavy neutrinos with gauge-mediated interactions

被引：7

作者：

Biondini, S. ^{[1
]}

Panella, O. ^{[2
]}

机构：

[1] Univ Bern, Inst Theoret Phys, AEC, Sidlerstr 5,C3012, Bern, Switzerland

[2] Ist Nazl Fis Nucl, Sez Perugia, Via A Pascoli, I-06123 Perugia, Italy

来源：

EUROPEAN PHYSICAL JOURNAL C | 2017年 / 77卷 / 09期

基金：

瑞士国家科学基金会;

关键词：

EXCITED-LEPTON PRODUCTION; MODEL CP-VIOLATION; BARYON ASYMMETRY; BARYOGENESIS; QUARK; INVARIANCE; DEGENERATE; DECAYS;

D O I：

10.1140/epjc/s10052-017-5206-x

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

Leptogenesis is an appealing framework to account for the baryon asymmetry in the universe. To this end physics beyond the standard model is demanded. In this paper we investigate the possibility to attain successful lepto-genesis with composite Majorana neutrinos. We work in the framework of effective gauge-mediated and contact interactions without any reference to an underlying compositeness theory. This approach is the one adopted in all current experimental searches for composite fermions at colliders. In the case of gauge-mediated interactions, we calculate the CP asymmetry in heavy composite neutrino decays. Both the direct and the indirect CP asymmetry are derived and resonant leptogenesis is also discussed. We find that the Sakharov conditions can be met and, for some choice of the parameters, the correct order of magnitude of the baryon asymmetry is reproduced.

引用

页数：15

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