Next-to-minimal R-symmetric model: Dirac gaugino, Higgs mass and invisible width
Next-to-minimal R-symmetric model: Dirac gaugino, Higgs mass and invisible width
复制标题
次小 R 对称模型：狄拉克高奇诺、希格斯质量和隐形宽度
DOI：
10.1093/ptep/ptw007
复制
发表时间：
2016
影响因子：
3.5
通讯作者：
Masaki Yoshikawa
中科院分区：
文献类型：
--
作者：
Hiroaki Nakano;Masaki Yoshikawa
我们研究了最小对称模型的一个单态扩展，它具有Dirac gauginos和对称Higgs扇区的良好性质。同时，带电单线态与希格斯双线态的超势耦合可以对希格斯玻色子质量做出实质性贡献。我们表明，125 GeV的希格斯玻色子是一致的微扰统一，即使超对称尺度低至1 TeV，如果长期希格斯势被抑制，通常是在狄拉克gauginos的情况下。该模型还包含了一个轻标量和费米子，一个赝模和伪goldstino：前者的质量主要来自超对称破缺的软项，除了后者的一个小的显式对称破缺。我们研究如何希格斯质量和宽度受到这些光自由度。具体来说，我们发现，根据带电希格斯粒子的参数，一个伪模量轻于标准模型希格斯玻色子质量的一半仍然允许的约束，从看不见的衰变的theand希格斯玻色子。我们还发现，这样一个轻标量可以减少希格斯玻色子的质量，最多几个单位。
We study a singlet extension of the minimalsymmetric model, which shares the nice properties of Dirac gauginos and the-symmetric Higgs sector. At the same time, a superpotential coupling of an-charged singlet to the Higgs doublets can make a substantial contribution to the Higgs boson mass. We show that the 125 GeV Higgs boson is consistent with perturbative unification, even if the SUSY scale is as low as 1 TeV and if the-term Higgs potential is suppressed, as is often the case in Dirac gauginos. The model also contains a light scalar and fermion, a pseudo-modulus and pseudo-goldstino: The former gets its mass mainly from SUSY-breaking soft terms, in addition to a small explicit-symmetry breaking for the latter. We examine how the Higgs mass and width are affected by these light degrees of freedom. Specifically, we find that, depending on the parameters of-charged Higgses, a pseudo-moduli lighter than half of the Standard Model Higgs boson mass is still allowed by the constraints from invisible decays of theand Higgs bosons. We also find that such a light scalar can reduce the Higgs boson mass, at most by a few percents.