Event shape criteria for single-lepton top signals

Abstract

Single-lepton plus jets signals from $t\bar{t}$ production at hadron colliders generally give more spherically symmetrical events than the principal backgrounds from $W$ production. We show that sphericity and aplanarity criteria, applied to lepton plus neutrino plus four jet final states at the Fermilab Tevatron $p\bar{p}$ collider, help to discriminate; they can be used either to validate an eventual top signal or simply to reduce background. An alternative circularity criterion in the transverse plane is less successful.

Standard Latex file, 8 pages. 3 figures, encoded using "uufiles", also submitted to hep-ph; uncompressed PS files or hardcopies available upon request. MAD/PH/777

References in corpus (1)

• Heavy Top Quark Searches in the Di-Lepton Mode at the Tevatron

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