Search for narrow tt̅ resonances in pp̅ collisions at √s=1.8 TeV

Abazov, V. M. ; Narasimham, V. S. ; et., al (2004) Search for narrow tt̅ resonances in pp̅ collisions at √s=1.8 TeV Physical Review Letters, 92 (22). 221801_1-221801_6. ISSN 0031-9007

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Official URL: http://prl.aps.org/abstract/PRL/v92/i22/e221801

Related URL: http://dx.doi.org/10.1103/PhysRevLett.92.221801

Abstract

A search for narrow resonances that decay into tt̅ pairs has been performed using 130 pb-1 of data in the lepton + jets channel collected by the DØ detector in pp̅ collisions at √s=1.8 TeV. There is no significant deviation observed from the standard-model predictions at a top-quark mass of 175 GeV/c2. We therefore present upper limits at the 95% confidence level on the product of the production cross section and branching fraction to tt̅ for narrow resonances as a function of the resonance mass MX. These limits are used to exclude the existence of a leptophobic top-color particle with mass MX<560 GeV/c2, using a theoretical cross section for a width ΓX=0.012MX.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:34944
Deposited On:02 May 2011 13:17
Last Modified:02 May 2011 13:17

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