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SEQUENCE:0
UID:UW-Physics-Event-3009
DTSTART:20130412T191500Z
DURATION:PT1H0M0S
DTSTAMP:20260420T004713Z
LAST-MODIFIED:20130407T233044Z
LOCATION:5280 Chamberlin Hall
SUMMARY:Radiatively-driven Natural Supersymmetry\, Theory Seminar (Hig
 h Energy/Cosmology)\, Howard Baer\, University of Oklahoma
DESCRIPTION:While LHC has discovered a light Higgs boson at 125 GeV ly
 ing squarely within the predicted MSSM window\, so far no sign of SUSY
  matter has emerged\, thus requiring gluino and squark masses in the T
 eV-or-beyond regime. This seemingly exacerbates the Little Hierarchy P
 roblem: why are m(Z) and m(h) ~100 GeV while sparticle masses are so h
 eavy? We propose a conservative\, model-independent measure of electro
 weak naturalness in supersymmetric models. Requiring finetuning at the
  ~10% level within the NUHM2 model\, a SUSY spectrum with light higgsi
 nos ~100-200 GeV but with TeV-scale highly mixed top squarks emerges w
 hich easily explains why m(h)~125 GeV while no sparticle signals appea
 r at LHC8. A new SUSY signature--same-sign diboson production with min
 imal jet activity--emerges for LHC14. The smoking gun signature of lig
 ht higgsinos are difficult to see at LHC but should be easily discover
 ed at a linear e+e- collider\, which in this case would be a higgsino\
 , in addition to a Higgs factory. Thermally produced higgsino dark mat
 ter leaves room for axions as co-dark-matter particles. The light higg
 sinos should be visible at ton-scale noble liquid WIMP detectors.
URL:https://www.physics.wisc.edu/events/?id=3009
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