Pulling out all the stops: searching for RPV SUSY with stop-jets
Yang Bai (Department of Physics, University of Wisconsin, 1150 University Avenue, Madison, WI 53706, U.S.A.); Andrey Katz (Center for the Fundamental Laws of Nature, Jefferson Physical Laboratory, Harvard University, 17 Oxford Street, Cambridge, MA 02138, U.S.A.); Brock Tweedie (Physics Department, Boston University, 590 Commonwealth Avenue, Boston, MA 02215, U.S.A., PITT PACC, Department of Physics and Astronomy, University of Pittsburgh, 3941 O’Hara Street, Pittsburgh, PA 15260, U.S.A.)
If the lighter stop eigenstate decays directly to two jets via baryonic R-parity violation, it could have escaped existing LHC and Tevatron searches in four-jet events, even for masses as small as 100 GeV. In order to recover sensitivity in the face of increasingly harsh trigger requirements at the LHC, we propose a search for stop pairs in the highly-boosted regime, using the approaches of jet substructure. We demonstrate that the four-jet triggers can be completely bypassed by using inclusive jet- H T triggers, and that the resulting QCD continuum background can be processed by substructure methods into a featureless spectrum suitable for a data-driven bump-hunt down to 100 GeV. We estimate that the LHC 8 TeV run is sensitive to 100 GeV stops with decays of any flavor at better than 5σ-level, and could place exclusions up to 300 GeV or higher. Assuming Minimal Flavor Violation and running a b -tagged analysis, exclusion reach may extend up to nearly 400 GeV. Longer-term, the 14 TeV LHC at 300 fb −1 could extend these mass limits by a factor of two, while continuing to improve sensitivity in the 100 GeV region.
