ACP Seminar (Astronomy - Cosmology - Particle Physics)

Speaker: Jamie Tattersall (U Bonn)
Title: How low can SUSY go? Monojets, matching and compressed spectra
Date (JST): Wed, Feb 27, 2013, 13:30 - 14:30
Place: Seminar Room A
Related File: 865.pdf
Abstract: The LHC experiments now place significant constraints on the parameters of Supersymmetry (SUSY). For example, in the case of the commonly studied mSugra model, with equal mass squarks and gluinos the bounds now reach 1.4TeV. However, if we move away from specific models it is possible that these bounds can be substantially weakened. One example is that if the SUSY particles have a compressed spectra, the particles produced in the cascade decay can be too soft to pass any cuts. In this case, the role of initial state radiation (ISR) is vital to discover and set limits on the spectrum. To accurately describe ISR, we find that matching parton showers to the matrix element prediction is essential. In addition, we find that for very compressed spectra, monojet searches can outperform the typical SUSY analyses.