b-ID • Four taggers currently being worked on for p13 • Secondary Vertex • Soft muons in jets • Two Impact parameter taggers: CSIP Jet Lifetime probability • Documentation and plots available on the b-id webpage: Follow the link Official Certified b-Taggers (But beware the process of certification has started, but not yet certified) • Available Macros on TMBTrees for all four of them • Code for TMB exists in various stages of development. some done, some done but not compiling, some still being written.
b-ID certification • What is stalling us? • The tracking in p13 seems to be mysterious. • Better resolutions • But, too many fakes • We did not expect this, as we had tested the apparently “p13” equivalent GTR+HTF in the TARC samples. • At the moment we will go back and do a comparison on the same muon+jet and background runs p11 vs p13 • Hopefully this is help us understand the issues causing limiations • In p13 efficiency lower by 20% or so and background up by a factor of 2 or more for pT cuts on track of 0.5 GeV. Can control this rate by raising pT cut (which is probably not very desirable for most physics.)