Electroweak theory based on SU(4)L⊗U(1)X gauge group

作     者：H. N. Long L. T. Hue D. V. Loi 

作者机构：Theoretical Particle Physics and Cosmology Research Group Ton Duc Thang University Ho Chi Minh City 700000 Vietnam Faculty of Applied Sciences Ton Duc Thang University Ho Chi Minh City 700000 Vietnam Institute of Research and Development Duy Tan University Da Nang City 550000 Vietnam Institute of Physics Vietnam Academy of Science and Technology 10 Dao Tan Ba Dinh Hanoi 100000 Vietnam Faculty of Mathematics-Physics-Informatics Tay Bac University Quyet Tam Son La 360000 Vietnam 

出 版 物：《Physical Review D》 (物理学评论D辑：粒子、场、重力与宇宙学)

年 卷 期：2016年第94卷第1期

页      面：015007-015007页

核心收录：

学科分类：07[理学] 070201[理学-理论物理] 0702[理学-物理学] 

基　　金：Vietnam National Foundation for Science and Technology Development (NAFOSTED) [103.01-2014.51] 

主　　题：Anomalies Extensions of Higgs sector Extensions of gauge sector Hypothetical particle physics models Non-Abelian gauge theories 

摘      要：This paper includes two main parts. In the first part, we present generalized gauge models based on the SU(3)C⊗SU(4)L⊗U(1)X (3-4-1) gauge group with arbitrary electric charges of exotic leptons. The mixing matrix of neutral gauge bosons is analyzed, and the eigenmasses and eigenstates are obtained. The anomaly-free as well as matching conditions are discussed precisely. In the second part, we present a new development of the original 3-4-1 model [R. Foot, H. N. Long, and T. A. Tran, Phys. Rev. D 50, R34 (1994), F. Pisano and V. Pleitez, Phys. Rev. D 51, 3865 (1995).]. Different from previous works, in this paper the neutrinos, with the help of the scalar decuplet H, get the Dirac masses at the tree level. The vacuum expectation value (VEV) of the Higgs boson field in the decuplet H acquiring the VEV responsible for neutrino Dirac mass leads to mixing in separated pairs of singly charged gauge bosons, namely the Standard Model (SM) W boson and K, the new gauge boson acting in the right-handed lepton sector, as well as the singly charged bileptons X and Y. Due to the mixing, there occurs a right-handed current carried by the W boson. From the expression of the electromagnetic coupling constant, ones get the limit of the sine-squared of the Weinberg angle, sin2θW0.25, and a constraint on electric charges of extra leptons. In the limit of lepton number conservation, the Higgs sector contains all massless Goldstone bosons for massive gauge bosons and the SM-like Higgs boson. Some phenomenology is discussed.