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A blind search for supersymmetry in p(bar)p collisions at sqr(s) = 1.8 TeV using the missing energy plus multijet channel

Posted on:2001-07-03Degree:Ph.DType:Dissertation
University:Harvard UniversityCandidate:Spiropulu, MariaFull Text:PDF
GTID:1460390014456338Subject:Physics
Abstract/Summary:
A data sample of 84.37 pb–1 of pp¯ collisions at s = 1.8 TeV recorded by the Collider Detector at Fermilab is analyzed in search of scalar quarks (squarks, q˜) and gluinos (g˜). The final state of large missing energy plus ≥3 jets, characteristic of hadroproduction and subsequent decays of squarks and gluinos within the minimal supersymmetry and supergravity frameworks with R-parity conservation, is used in the search. The blind analysis method is followed to avoid biases in the data selection. The search is negative at 95% C.L. for gluino masses below 300 GeV/c 2 for the case mq˜ ≈ mg˜ and 195 GeV/c 2 independent of the squark mass. Being that the limit on the gluino mass provides tight fine-tuning constraints on low-energy supersymmetry the result of this search has phenomenological implications on models with unification constraints. It also demonstrates that the missing energy plus multijet channel is a powerful probe for supersymmetry in the upcoming Tevatron Collider run.
Keywords/Search Tags:Missing energy plus, Supersymmetry, Search
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