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 Dark matter in (partially) composite Higgs models
 2018-11-15     Text Size:  A  A  A
 CAS Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences Seminar Title 题目 Dark matter in (partially) composite Higgs models Speaker 报告人 Diogo Buarque Franzosi Affiliation 所在单位 Gottingen U. Date 日期 2018年11月15日（周四）下午16:00 Venue 地点 Conference Room 6620, ITP new building Abstract 摘要 (Based on arXiv:1808.07515) We construct composite and partially composite Higgs models with complex pseudo-Nambu--Goldstone (pNGB) dark matter states  from four-dimensional gauge-Yukawa theories with strongly interacting fermions. The fermions  are partially gauged under the electroweak symmetry, and the dynamical electroweak  symmetry breaking sector is minimal.  The pNGB dark matter particle is stable  due to a $\mathrm{U}(1)$ technibaryon-like symmetry, also present in the technicolor limit of the models. However, the relic density is particle anti-particle symmetric and due to thermal freeze-out as opposed to the technicolor limit where it is typically due to an asymmetry.  The pNGB Higgs is composite or partially composite depending on the origin of the Standard Model  fermion masses, which impacts the dark matter phenomenology. We illustrate the  important features with a model example invariant under an $\SU(4)\times \SU(2) \times \mathrm{U}(1)$ global symmetry. Contact Person 所内联系人 Jing Shu
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