物理系學術報告：Dark Matter and Higgs Bosons in MSSM

報告題目： Dark Matter and Higgs Bosons in MSSM 報告人：韓濤清華大學短期千人計劃成員，美國匹茨堡大學物理天文系教授報告時間： 2013－6－4 15:00 報告地點：理科樓三樓報告廳摘要： In the framework of the minimal supersymmetric extension of the standard model (MSSM), we search for solutions that (a) are consistent with the Higgs discovery and other collider searches; (b) satisfy the flavor constraints from B physics; (c) give a DM candidate with the correct thermal relic density; and (d) are allowed by the DM direct detection experiments. For the surviving models with our parameter scan, we find the following features: (1) Constraints from the Higgs sector and rare b decay measurements exclude the low mass region favored by the DAMA, CoGeNT, CRESST, and Super-CDMS experiments; (2) The relic density requirement clearly pins down the solutions from the Z and Higgs resonances (Z,h,H,A funnels) and co-annihilations; (3) Future direct search experiments will likely fully cover the Z,h funnel regions, and H,A funnel regions as well except for the "blind spots"; (4) The branching fraction for the SM-like Higgs decay to DM can be as high as 10%, while those from heavier Higgs decays to neutralinos and charginos can be as high as 20%. Our results show that collider searches provide valuable information complementary to what may be obtained from direct detections and astro-particle observations, and that the Higgs bosons may play an essential role. 個人簡介：韓濤教授是當前美國最活躍的粒子理論學家之一，其科研成果在該領域的理論及實驗上都很有影響。他曾任美國威斯康星大學麥迪遜分校物理系教授及基本粒子研究所所長，現任美國匹茨堡大學物理天文系教授,粒子物理天體物理宇宙學中心主任。他是美國物理學會Fellow ，中科院Kavli 理論研究所顧問委員會委員，現任Physical Review D雜志和“高能物理與核物理”編輯部的編委。曾獲得美國國家SSCFellowship，Fermilab Frontier Fellowship，德國DESY Guest Professorship，Wisconsin 大學H.I. Romnes Faculty Fellowship，國家自然科學基金委海外傑出青年獎。他2004-2007年任清華大學物理系長江講座教授，是清華大學高能物理中心學術委員，為清華大學高能物理學科的發展建設以及青年教師、學生的培養提供了許多寶貴的建議，做了大量重要工作。