Minimal Dilaton Model (MDM)

Authors

• Junjie Cao
  • Henan Normal University; Center for High Energy Physics, Peking University
  • junjiec@…
• Xiqing Hao
  • Henan Normal University
  • haoxq@…
• Zhaoxia Heng
  • Henan Normal University
  • zhaoxiaheng@…
• Liangliang Shang
  • Henan Normal University
  • shlwell1988@…
• Yang Zhang
  • Institute of Theoretical Physics, Academia Sinica
  • phyzhangyang@…

Description of the model

This model is an extension of the SM by introducing a linearized singlet dilaton field S and a vector-like top partner T with the same quantum number as the right-handed top quark. The low energy effective Lagrangian of the MDM is given by [1] [2] [3]:

where L_SM is the part of the SM Lagrangian without the Higgs potential, M presents the scale of a certain strong dynamics in which the fields T and S are involved, q_3L is the SU(2)_L left-handed quark doublet of the third generation, and M_H, M_S, λ_S, κ and λ_H are all free parameters describing the new Higgs potential.

Model files

• MDM.fr: the main model file.
• MDM.nb: the example of Mathematica notebook that loads the model, calculates the Feynman rules and extracts the model files within the CalcHEP output and the UFO output.
• Minimal-Dilaton-Model-CH.tar.gz: the model files within the CalcHEP output.
• Minimal_Dilaton_Model_UFO.tar.gz: the model files within the UFO output.

Notes:

• Except the free parameters in the SM, there are still five free parameters in the MDM：
  • f: the vacuum expectation value of Dilaton;
  • θ_L: the mixing angle of top and top partner;
  • θ_S: the mixing angle of Higgs and Dilaton;
  • m_s: the mass of dilaton-boson;
  • m_t^': the mass of top partner.
• The dilaton-boson mass and width are set using the parameters MsDM and WsDM, respectively.
• The top partner mass and width are set using the parameters MTP and WTP, respectively.
• The vacuum expectation value of Dilaton is given by vevf.
• The tangent value of Higgs-Dilaton mixing angle is set by ts.
• The sine value of top and top partner mixing angle is set by sl.

Validation

References

[1] Tomohiro Abe, Ryuichiro Kitano, Yasufumi Konishi, Kin-ya Oda, Joe Sato and Shohei Sugiyama, Minimal Dilaton Model, Phys. Rev. D86 (2012) 115016, ​arXiv:1209.4544 [hep-ph].

[2] Junjie Cao, Yangle He, Peiwen Wu, Mengchao Zhang and Jingya Zhu, Higgs phenomenology in the Minimal Dilaton Model after Run I of the LHC, JHEP 1401 (2014) 150, ​arXiv:1311.6661 [hep-ph].

[3] Junjie Cao, Zhaoxia Heng, Dongwei Li, Liangliang Shang, Peiwen Wu, Higgs-strahlung production process e⁺e⁻ → Zh at the future Higgs factory in the Minimal Dilaton Model, ​arXiv:1405.4489 [hep-ph].