Sterile neutrino dark matter and leptogenesis in Left-Right Higgs Parity

被引：13

作者：

Dunsky, David ^{[1
,2
]}

Hall, Lawrence J. ^{[1
,2
]}

Harigaya, Keisuke ^{[3
]}

机构：

[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[2] Lawrence Berkeley Natl Lab, Theoret Phys Grp, Berkeley, CA 94720 USA

[3] Inst Adv Study, Sch Nat Sci, Olden Lane, Princeton, NJ 08540 USA

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2021年 / 2021卷 / 01期

基金：

美国国家科学基金会;

关键词：

Beyond Standard Model; Cosmology of Theories beyond the SM; Higgs Physics; Neutrino Physics; STRONG CP PROBLEM; STRONG P; LEPTON NUMBER; CONSTRAINTS; MASS; SUPERSYMMETRY; CONSERVATION; VIOLATION; SYMMETRY; AXIONS;

D O I：

10.1007/JHEP01(2021)125

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：

The standard model Higgs quartic coupling vanishes at (10(9) - 10(13)) GeV. We study SU(2)(L)x SU(2)(R)x U(1)(B-L) theories that incorporate the Higgs Parity mechanism, where this becomes the scale of Left-Right symmetry breaking, v(R). Furthermore, these theories solve the strong CP problem and predict three right-handed neutrinos. We introduce cosmologies where SU(2)(R)x U(1)(B-L) gauge interactions produce right-handed neutrinos via the freeze-out or freeze-in mechanisms. In both cases, we find the parameter space where the lightest right-handed neutrino is dark matter and the decay of a heavier one creates the baryon asymmetry of the universe via leptogenesis. A theory of flavor is constructed that naturally accounts for the lightness and stability of the right-handed neutrino dark matter, while maintaining sufficient baryon asymmetry. The dark matter abundance and successful natural leptogenesis require v(R) to be in the range (10(10)- 10(13)) GeV for freeze-out, in remarkable agreement with the scale where the Higgs quartic coupling vanishes, whereas freeze-in requires v(R) greater than or similar to 10(9) GeV. The allowed parameter space can be probed by the warmness of dark matter, precise determinations of the top quark mass and QCD coupling by future colliders and lattice computations, and measurement of the neutrino mass hierarchy.

引用

页数：47

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