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题名: Electroweak baryogenesis, CDM and anomaly-free supersymmetric U(1)
作者: Kang, JH ;  Langacker, P ;  Li, TJ ;  Liu, T
刊名: JOURNAL OF HIGH ENERGY PHYSICS
出版日期: 2011
期号: 4, 页码:97
关键词: COLLIDING VACUUM BUBBLES ;  NUMBER NON-CONSERVATION ;  WEAK PHASE-TRANSITION ;  STANDARD MODEL ;  GRAVITATIONAL-RADIATION ;  SYMMETRY-BREAKING ;  BARYON-NUMBER ;  GAUGE BOSONS ;  NONPERTURBATIVE ANALYSIS ;  COSMIC STRINGS
学科分类: Physics
通讯作者: Kang, JH (reprint author), Inst Adv Study, Sch Nat Sci, Einstein Dr, Princeton, NJ 08540 USA.
部门归属: [Kang, Junhai; Langacker, Paul] Inst Adv Study, Sch Nat Sci, Princeton, NJ 08540 USA; [Li, Tianjun] Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China; [Li, Tianjun] Texas A&M Univ, George P & Cynthia W Mitchell Inst Fundamental Ph, College Stn, TX 77843 USA; [Liu, Tao] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA
英文摘要: We construct an anomaly-free supersymmetric U(1)' model with a secluded U(1)'-breaking sector (sMSSM), with E(6) embedding. Then we systematically study electroweak baryogenesis (EWBG) driven by spontaneous CP-violation (SCPV), using the sMSSM as an example. Unlike the Minimal Supersymmetric Standard Model (MSSM), CP violation in the Higgs sector can be both spontaneous and explicit in the sMSSM, even at tree level. These new CP sources do not introduce significant new contributions to electric dipole moments of the electron and neutron. Novel features are found in the EWBG driven by SCPV (significantly different from the ones in the MSSM). First, due to the space-dependence of the relevant CP phases, the CP-violating stop and chargino currents do not require a variation of tan beta in the bubble wall to have a non-trivial structure at the lowest order of Higgs insertion. Second, there exists a new type of CP-violating current at the leading order. Because of this, in addition to leptons and charginos, top quarks and top squarks can also play a significant role in the EWBG. Numerical results show that the baryon asymmetry is large enough to explain the cosmological observation today. We illustrate that EWBG and neutralino cold dark matter can be accommodated in the same framework, i.e., there exists parameter space where a strong enough first order EWPT, large CP phase variations across the bubble wall, a reasonable baryon asymmetry as well as an acceptable neutralino dark matter relic density can be achieved simultaneously.
资助者: IBM; NSF [PHY-0503584]; Natural Science Foundation of China [10821504]; DOE [DE-FG03-95-Er-40917, DE-FG02-90ER40560]; Mitchell-Heep Chair in High Energy Physics; Fermi-McCormick Fellowship
收录类别: SCI
原文出处: 查看原文
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/14381
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Recommended Citation:
Kang, JH,Langacker, P,Li, TJ,et al. Electroweak baryogenesis, CDM and anomaly-free supersymmetric U(1)[J]. JOURNAL OF HIGH ENERGY PHYSICS,2011(4):97.
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