

作者  Lin, Chilong 
出版日期  20180126 
著作名稱  A twoHiggsdoublet Model Free of FlavorChanging Neutral Currents Naturally at TreeLevel

會議名稱  2018 Annual Meeting of the Physics Society of Taiwan 
會議地點  台北 
主辦單位  台灣物理學會 
國際性會議  N 
主題  物理;物理 
關鍵字  2HDM, FCNC, CP violation 
摘要  A new type of twoHiggsdoublet model (2HDM) free of flavorchanging neutral currents (FCNCs) naturally at treelevel is to be presented in this article. Unlike previous naturalflavorconserving (NFC) models, such a model allows both Higgs doublets to couple with a same fermion simultaneously. Both components of its quark mass matrices corresponding to different Higgs doublets are nonvanish and can be diagonalized by a same unitary transformation. That means the problem of NFCNs at treelevel does not exist in such a model. The general pattern of such FCNCfree matrix pairs is derived without any assumptions or symmetries except the hermiticity of the mass matrices. That assumption gives a FCNCfree condition which reduces the number of parameters in the mass matrices down to a manageable level. Thus, eigenvalues and eigenvectors are analytically derived and found to be very simple. The unitary transformation matrix for each fermion type depends only on two parameters. It looks much more rational than previous similar models. 
系統號  NO000005064 

