Search for narrow tt resonances in pp collisions at square root of (s)=1.8 TeV.

Search for narrow tt resonances in pp collisions at square root of (s)=1.8 TeV.

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A search for narrow resonances that decay into tt pairs has been performed using 130 pb(-1) of data in the lepton + jets channel collected by the Dphi detector in pp collisions at square root of (s)=1.8 TeV. There is no significant deviation observed from the standard-model predictions at a top-quar...

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Bibliographic Details
Main Authors: Abazov, V, Abbott, B, Abdesselam, A, Abolins, M, Abramov, V, Acharya, B, Adams, D, Adams, M, Ahmed, SN, Alexeev, G, Alton, A, Alves, G, Anderson, E, Arnoud, Y, Avila, C, Babintsev, V, Babukhadia, L, Bacon, T, Baden, A, Baffioni, S, Baldin, B, Balm, P, Banerjee, S, Barberis, E, Baringer, P
Format: Journal article
Language:English
Published: 2004
Description
Summary:A search for narrow resonances that decay into tt pairs has been performed using 130 pb(-1) of data in the lepton + jets channel collected by the Dphi detector in pp collisions at square root of (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 tt 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 GammaX=0.012MX.

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