Silicon drift detectors with integrated JFET: Simulation and design

705-713High resolution, low energy X-ray spectroscopy systems have been developed recently using the Silicon drift detector (SDD) with in-built Junction field effect transistor (JFET). A comprehensive simulation study of the SDD and integrated JFET with a view to formulate the design flow has been carried out. An optimized process flow for fabrication of SDD and integrated JFET on high resistivity detector substrate is presented. Based on these studies, several mask layouts for the SDD, JFET and reset MOSFET have been designed. </span

Search for heavy resonances in the W/Z-tagged dijet mass spectrum in pp collisions at 7 TeV

A search has been made for massive resonances decaying into a quark and a vector boson, qW or qZ, or a pair of vector bosons, WW, WZ, or ZZ, where each vector boson decays to hadronic final states. This search is based on a data sample corresponding to an integrated luminosity of 5.0 fb 121 of proton\u2013proton collisions collected in the CMS experiment at the LHC in 2011 at a center-of-mass energy of 7 TeV. For sufficiently heavy resonances the decay products of each vector boson are merged into a single jet, and the event effectively has a dijet topology. The background from QCD dijet events is reduced using recently developed techniques that resolve jet substructure. A 95% CL lower limit is set on the mass of excited quark resonances decaying into qW (qZ) at 2.38 TeV (2.15 TeV) and upper limits are set on the cross section for resonances decaying to qW, qZ, WW, WZ, or ZZ final states