摘要
As one of the key properties of the Higgs boson, the Higgs total width is sensitive to the global profile ofthe Higgs boson couplings, and thus new physics would modify the Higgs width. We investigate the total width invarious new physics models, including various scalar extensions, composite Higgs models, and the fraternal twinHiggs model. Typically, the Higgs width is smaller than the standard model value due to mixture with other scalarsif the Higgs is elementary, or curved Higgs field space for the composite Higgs. On the other hand, except for thepossible invisible decay mode, the enhanced Yukawa coupling in the two Higgs doublet model or the exotic fermionembeddings in the composite Higgs could enhance the Higgs width greatly. The precision measurement of the Higgstotal width at the high-luminosity LHC can be used to discriminate certain new physics models.
作者
曹庆宏
李浩林
徐凌霄
于江浩
Qing-Hong Cao;Hao-Lin Li;Ling-Xiao Xu;Jiang-Hao Yu(Department of Physics and State Key Laboratory of Nuclear Physics and Technology,Peking University,Beijing 100871,China;Collaborative Innovation Center of Quantum Matter,Beijing 100871,China;Center for High Energy Physics,Peking University,Beijing 100871,China;CAS Key Laboratory of Theoretical Physics,Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100190,China;Scuola Normale Superiore,Piazza dei Cavalieri 7,56126,Pisa,Italy;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;School of Fundamental Physics and Mathematical Sciences,Hangzhou Institute for Advanced Study,UCAS,Hangzhou 310024,China;International Centre for Theoretical Physics Asia-Pacific,Beijing/Hangzhou,China)
基金
Supported in part by the National Science Foundation of China(11725520,11675002,11635001,12022514,11875003,12047503)
supported by the National Key Research and Development Program of China(2020YFC2201501)。
