New Physics Searches Involving b-Quarks at the LHC

by Prof. Manuel Drees (Physics, University of Bonn)

Tuesday Feb 22, 2011, 3:00 PM → 4:30 PM Pacific/Honolulu

417 (Watanabe Hall)

This talk discusses two analyses where the detection of b-quarks plays a crucial role. The first part deals with the associate production of an intermediate mass neutral Higgs boson in association with a leptonically decaying W boson; the Higgs boson decays into two lighter neutral bosons, each of which decays into a "b-bar b" pair, leading to an "l nu 4b" final state. This should allow to cover part of the "LEP hole" in the parameter space of the MSSM with explicit CP violation (or similar models). The second part discusses the associate production of a light stop pair and a "b-bar b" pair in cases where the "stop-LSP" mass difference is so small that simple "stop" pair production may not give a viable signal. It is shown that this final state is detectable for "stop_1" mass up to about 250 GeV; moreover, it might allow to directly determine the "stop_1" "chargino bottom" coupling.