Search for Scalar Top Quarks and Higgsino-Like Neutralinos: - download pdf or read online

By Takuya Nobe

ISBN-10: 9811000018

ISBN-13: 9789811000010

This ebook experiences a look for theoretically ordinary supersymmetry (SUSY) on the huge Hadron Collider (LHC). the information accumulated with the ATLAS detector in 2012 corresponding to 20 /fb of an built-in luminosity were analyzed for cease pair construction in proton–proton collisions at a center-of-mass power of eight TeV on the huge Hadron Collider (LHC) within the situation of the higgsino-like neutralino.

The writer specializes in cease decaying right into a backside quark and chargino. within the situation of the higgsino-like neutralino, the mass distinction among charginos and neutralinos (Δm) is predicted to be small, and observable final-state debris tend to have low-momentum (soft). the writer develops a committed research with a gentle lepton as a probe of debris from chargino decay, which

suppresses the big volume of backgrounds. a result of research, no major SUSY sign is saw. The ninety five% confidence-level exclusion limits are set to plenty of cease and neutralino assuming Δm = 20 GeV. The quarter with ΔM (the mass distinction among cease and neutralino) < 70 GeV is excluded for the 1st time at cease mass of under 210 GeV. the writer additionally excludes the indications with ΔM > one hundred twenty GeV as much as six hundred GeV of cease mass with neutralino mass of under 280 GeV. the writer truly exhibits only a few final parameter areas for gentle cease (e.g., topology of cease decay is intensely just like the SM best quark) via combining his effects and former ATLAS analyses. His effects offer a powerful constraint to searches for brand new physics within the future.

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Search for Scalar Top Quarks and Higgsino-Like Neutralinos: SUSY Hunting With a “Soft” Lepton at the LHC (Springer Theses) by Takuya Nobe


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