Neutrino mass, leptogenesis, and dark matter from the dark sector with U(1) D
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Springer
Received: October 6, Revised: February 28, Accepted: March 6, Published: March 23,
2017 2018 2018 2018
Wei-Min Yang Department of Modern Physics, University of Science and Technology of China, No. 96, Jinzhai Road Baohe District, Hefei, 230026 P.R. China
E-mail: [email protected] Abstract: I suggest a new extension of the SM by introducing a dark sector which has several new particles and a local U(1)D symmetry. The dark particles bring about the new and interesting physics beyond the SM. The model can generate the tiny neutrino mass by a hybrid see-saw mechanism, achieve the leptogenesis at the TeV scale, and account for the cold dark matter. All of the three things collectively arise from the dark sector. In particular, it is very feasible to test the model predictions and probe the dark sector in near future experiments. Keywords: Beyond Standard Model, Neutrino Physics ArXiv ePrint: 1710.00691
c The Authors. Open Access, Article funded by SCOAP3 .
https://doi.org/10.1007/JHEP03(2018)144
JHEP03(2018)144
Neutrino mass, leptogenesis, and dark matter from the dark sector with U(1)D
Contents 1
2 Model
2
3 Leptogenesis
8
4 Dark matter
11
5 Numerical results and discussions
13
6 Conclusions
16
1
Introduction
The standard model (SM) of the particle physics has successfully accounted for all kinds of the physics at or below the electroweak scale, refer to the reviews in Particle Data Group [1], but it can not explain the three important issues: the tiny neutrino mass [2, 3], the matterantimatter asymmetry [4, 5], and the cold dark matter (CDM) [6, 7]. Many theories have been suggested to solve these problems. The tiny neutrino mass can be generated by the seesaw mechanism [8–10] or origin from the loop-diagram radiative generation [11, 12]. The baryon asymmetry can be achieved by the thermal leptogenesis [13, 14] or the electroweak baryogenesis [15, 16]. The CDM candidates are possibly the sterile neutrino [17, 18], the lightest supersymmetric particle [19], the axion [20], and so on. These theories ordinarily focus on only one of the three problems. In recent years, some inspired ideas attempt to find some connections among the neutrino mass, the baryon asymmetry, and the CDM, for example, the lepton number violation at the super-high scale can lead to the neutrino mass and the leptogenesis [21, 22], the neutrino mass and the leptogenesis can also be implemented by the super-heavy scalar triplet [23], the asymmetric CDM is related to the baryon asymmetry [24, 25], and some sophisticated models unifying them into a frame [26– 31]. Although many progresses on these fields have been made all the time, an universal and convincing theory is not established as yet. What is exactly a realistic theory beyond the SM? The universe harmony and the nature unification are a common belief of mankind. It is very possible that there is a common origin of the tiny neutrino mass, the matter-antimatter asymmetry and the CDM, which relates the three things to each other. Therefore, a new theory beyond the
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