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SUMMARY:How low can SUSY go? Matching\, monojets and compressed spectra. -
  Jamie Tattersall (Bonn)
DTSTART:20120614T150000Z
DTEND:20120614T160000Z
UID:TALK36221@talks.cam.ac.uk
CONTACT:Marcin Badziak
DESCRIPTION:The LHC experiments now place significant constraints on the p
 arameters of Supersymmetry (SUSY). For example\, in the case of the common
 ly studied mSugra model\, with equal mass squarks and gluinos the bounds n
 ow reach 1.4TeV. However\, if we move away from specific models it is poss
 ible that these bounds can be substantially weakened. One example is that 
 if the SUSY particles have a compressed spectra\, the particles produced i
 n the cascade decay can be too soft to pass any cuts. In this case\, the r
 ole of initial state radiation (ISR) is vital to discover and set limits o
 n the spectrum. To accurately describe ISR\, we find that matching parton 
 showers to the matrix element prediction is essential. In addition\, we fi
 nd that for very compressed spectra\, monojet searches can outperform the 
 typical SUSY analyses.
LOCATION:Seminar Room B\, Rutherford Building\, Cavendish Laboratory
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