COMPARISON OF CUT-BASED AND MATRIX ELEMENT METHOD RESULTS FOR BEYOND STANDARD MODEL QUARKS

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Akyazi E., Unel G., Yilmaz M.

ACTA PHYSICA POLONICA B, vol.44, no.6, pp.1273-1286, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 44 Issue: 6
  • Publication Date: 2013
  • Doi Number: 10.5506/aphyspolb.44.1273
  • Journal Name: ACTA PHYSICA POLONICA B
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1273-1286
  • Gazi University Affiliated: Yes

Abstract

In this work, two different methods for extracting the mass of a new quark from the (pseudo) data are compared: the classical cut-based method and the Matrix Element Method. As a concrete example, a fourth family up type quark is searched in p-p collisions of 7 TeV center-of-mass energy. We have shown that even with a very small number of events, Matrix Element Method gives better estimations for the mass value and its error. Especially, for event samples in which Signal-to-Background ratio is greater than 0.2, Matrix Element Method reduces the statistical error approximately ten times.