1、2013.6.4上海交通大学上海交通大学BBC NewsNov 19,2012 SUSY may not be dead,but these latest results have certainly put it into hospital Higgs production at LHC：Higgs decays:RedRed （MoriondMoriond)Black Black（Dec,2012Dec,2012）LHC Higgs DataNima Arkani-Hamed If the Higgs turns out to have spin two,hell quit physics
2、.If the Higgs turns out to be a techni-dilaton,hell kill himself.Goldstone Boson (massless)Higgs Boson (massive)Spontaneous Symmetry Breakingeaten by guage bosonMassive Gauge BosonThe nature of Higgs boson:a light fundamental Higgs boson indicates SUSYWhy?Mh 135 GeV in MSSM Mh 150 GeV in any low ene
3、rgy SUSY model In SM Higgs mass is a free parameterHiggs mass 125 GeV-signal of SUSY Reason-1:SM 100 GeV 1 TeV SUSY 1015 GeV GUT 2 /52100 GeVbareIf SM valid up to GUT scale,the theoryhas extreme fine-tuning!1693，NewtonGravitation law consistent with static universe?Fine-tuning ProblemReason-2:125 Ge
4、V Higgs-vacuum not stable-need SUSY Reason-3:Edward Witten(Higgs-related)Edward WittenCMSSM/mSUGRAGMSB,AMSB,SUSYMSSM,NMSSM,nMSSM,pMSSMR-violating SUSYSUSY models on the market:Dynamical solution to-problem Solve little hierarchy problemWhy NMSSM?Theoretically motivatedE6 models(superstring-inspired)
5、SO(10)U(1)string scale at low energy:S,Hu,Hd +heavy particles U(1)global PQto break U(1)PQ(NMSSM)tadpole (nMSSM)cubic term2 Status of low energy SUSY Consider various SUSY mdoels Consider all experimental constraints，scan the parameter space Examine the allowed parameter spacearXiv:1207.3698;1202.58
6、21 Cao,Heng,Yang,Zhudiphoton：ZZ*：All channels：More about CMSSM/mSUGRA：So,confronted with LHC data:Further Probes of SUSYThrough measuring Higgs couplings:arXiv:1207.3698;Cao,Heng,Yang,ZhuYukawa couplings to top and bottomThrough dark matter detection:light dark matter(8-10 GeV)?arXiv:1104.1754 Cao,H
7、ikasa,Wang,YangNMSSMMay 17,2013 CDMS talk at FNAL(by E.Figueroa-Feliciano)arXiv:1206.3865Cao,Han,Wu,Yang,Zhang Search for stop pair at LHC:Study Z versus at LHC:arXiv:1301.4641Cao,Wu,Wu,Yang Study Higgs pair production at LHC:arXiv:1301.6437Cao,Heng,Shang,Wan,Yang Think about Higgs-factory:C.Han,L.W
8、u,P.Wu,JMY,work in progressSUSYHow about Z-factory？JMY,arXiv:1006.25943 ConclusionConfronted with LHC Higgs data:Some SUSY models are healthy Some SUSY models need to be sent to hospitalLHC,HL-LHC,Higgs factory can further probe SUSY:Through measuring Higgs couplings Through some rare processes(hh,Z
9、 )Through stop pair production Dark matter detection expt(XENON)can interplayAfter all,when and where can SUSY be discovered？Where?Edward WittenOn SUSY,Frank Wilczek is still a believer,based on the renormalization group calculation he was a co-author of back in 1981.If no SUSY turns up at the next
10、LHC run though,even he will throw in the towel:I cannot believe this success is an accident.But in science faith is a means,not an end.Supersymmetry predicts new particles,with characteristic properties,that will come into view as the LHC operates at higher energy and intensity.The theory will soon undergo a trial by fire.It will yield gold or go up in smoke.He has a bet with Garrett Lisi that superparticles will be detected by July 8,2015.Frank Wilczek When?Thanks
