SU4 light stop signature analysis at ATLAS

Details SU4 light stop signature analysis at ATLAS SU4 light stop signature analysis at ATLAS

Apr 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aipc..899..207k&link_type=abstract

SIXTH INTERNATIONAL CONFERENCE OF THE BALKAN PHYSICAL UNION. AIP Conference Proceedings, Volume 899, pp. 207-208 (2007).

Mathematics

Group Theory

Supersymmetry, Supersymmetric Models, Models Based On Group Theory

Scientific paper

A possibility to observe light stop signal above the Standard Model background was analysed for SU4 low mass SUSY model. With a production cross section of 270 pb, SU4 seems to be a promising target for SUSY searches with early ATLAS data. In order to extract a light stop signal from the decay g~ --> t~1t --> χ~1+/-tb the final state tb invariant mass distribution was reconstructed. A kinematic endpoint was observed at a position close to the expected value for this decay chain which is 300 GeV. By establishing proper event selection criteria SM backgrounds can be suppressed to the level S/B > 4 with only 200 pb-1 of data. The analysis was performed on fully simulated ATLAS data.

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