Collider Constraints On LowMass WIMPHaipeng An, University of MarylandShanghai Jiao Tong UniversityIn collaboration with Xiangdong Ji, Lian-Tao Wang中国科学院理论物理研究所冬季研讨会-暗物质与重子物质起源2010.12.13-15
Collider Constraints On Low Mass WIMP Haipeng An, University of Maryland Shanghai Jiao Tong University In collaboration with Xiangdong Ji, Lian-Tao Wang 中国科学院理论物理研究所冬季研讨会 - 暗物质与重子物质起源 2010.12.13-15
OutlinesExperiments;PossibleInteractions BetweenWiMPand SM particles;Tevatron Constraintsontheparameterspace;Tevatron Constraintson directdetectioncross section;Relicabundance;Flavorchanging neutralcurrents
Outlines ◼ Experiments; ◼ Possible Interactions Between WIMP and SM particles; ◼ Tevatron Constraints on the parameter space; ◼ Tevatron Constraints on direct detection cross section; ◼ Relic abundance; ◼ Flavor changing neutral currents
Direct Detection ExperimentsCoGeNTObservedexcesscouldbeexplainedbyWiMPsignalwithmassintherangeof 6~11GeV.Cross section 10-41~10-40 cm2CRESST-IICaWO432eventscannotbeexplainedbyknownbackground.CanbeexplainedbyWiMPwithmassaroundsmallerthan15GeV.Andthecrosssectionisaboutafewtimes10-41cm2.XENON100Poisson smearing, null-result. New XENON100 result with a detectingpowertentimeslargerwill bepublishedsoon
Direct Detection Experiments ◼ CoGeNT Observed excess could be explained by WIMP signal with mass in the range of 6~11 GeV. Cross section 10-41~10-40 cm2. ◼ CRESST-II CaWO4 32 events cannot be explained by known background. Can be explained by WIMP with mass around smaller than 15 GeV. And the cross section is about a few times 10-41 cm2 . ◼ XENON100 Poisson smearing, null-result. New XENON100 result with a detecting power ten times larger will be published soon
Direct Detection Experiments10*39AMA15 GeV10~40GeNTCd[, rosson1041TT5GeVAMAvithchanneling1042Trottaetal.CMSSM95%CLTrottaetal.CMSSM68%CLCDMS104310-44-XENONIO0.loWLdecr.extrapolationXENONoo,globalLfit,const.extrapolation104511101001000Mass [GeVle?]
Direct Detection Experiments 15 GeV 5 GeV
Relic abundanceThermal freezing-outThermal freezing-in (Multi-components)SuperWIMPAsymmetricdarkmatterUsing relicabundanceas a lower bound
Relic abundance ◼ Thermal freezing-out ◼ Thermal freezing-in (Multi-components) ◼ SuperWIMP ◼ Asymmetric dark matter ◼ . . ◼ Using relic abundance as a lower bound