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首页> 外文期刊>Physical Review D >Electroweak vacuum stability in presence of singlet scalar dark matter in TeV scale seesaw models
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Electroweak vacuum stability in presence of singlet scalar dark matter in TeV scale seesaw models

机译：ElectroWeak真空稳定性在Tev Scalar暗物质的情况下在Tev Seceaw模型中存在

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摘要

We consider singlet extensions of the standard model, both in the fermion and in the scalar sector, to account for the generation of neutrino mass at the TeV scale and the existence of dark matter, respectively. For the neutrino sector we consider models with extra singlet fermions that can generate neutrino mass via the so- called inverse or linear seesaw mechanism, whereas a singlet scalar is introduced as the candidate for dark matter. We show that although these two sectors are disconnected at low energy, the coupling constants of both the sectors get correlated at the high-energy scale by the constraints coming from the perturbativity and stability/metastability of the electroweak vacuum. The singlet fermions try to destabilize the electroweak vacuum while the singlet scalar aids the stability. As an upshot, the electroweak vacuum may attain absolute stability even up to the Planck scale for suitable values of the parameters. We delineate the parameter space for the singlet fermion and the scalar couplings for which the electroweak vacuum remains stable/metastable and at the same time gives the correct relic density and neutrino masses and mixing angles as observed.
机译：我们考虑标准模型的单线次数，既在法米子和标量部门也会考虑到TEV规模和暗物质存在的中微生物的产生。对于中微子领域，我们考虑具有额外的单线态的模型，其可以通过所谓的逆或线性跷跷板机制产生中子质量，而单线标量被引入作为暗物质的候选物。我们表明，尽管这两个扇区在低能量下断开连接，但是两个扇区的耦合常数通过来自电流真空的扰动和稳定性/稳定性的约束来以高能量规模相关。单线态的态度赋予稳定性时，单线粒子试图使电挖掘真空稳定下来。作为结果，即使是用于参数的合适值，电挖掘真空也可以实现绝对稳定性。我们描绘了单线射灯的参数空间和电挖掘真空保持稳定/稳定的标量耦合，同时给出正确的遗物密度和中微子质量和观察到的混合角。

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  • 来源
    《Physical Review D》 |2017年第8期|055020.1-055020.17|共17页
  • 作者

    Ila Garg; Srubabati Goswami; K. N. Vishnudath; Najimuddin Khan;

  • 作者单位

    Department of Physics Indian Institute of Technology Bombay Powai Mumbai 400 076 India Theoretical Physics Division Physical Research Laboratory Ahmedabad 380009 India;

    Theoretical Physics Division Physical Research Laboratory Ahmedabad 380009 India;

    Theoretical Physics Division Physical Research Laboratory Ahmedabad 380009 India Discipline of Physics Indian Institute of Technology Gandhinagar 382355 India;

    Theoretical Physics Division Physical Research Laboratory Ahmedabad 380009 India;

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