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

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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Published in:Physical review letters 2004-06, Vol.92 (22), p.221801-221801
Main Authors: Abazov, V M, Abbott, B, Abdesselam, A, Abolins, M, Abramov, V, Acharya, B S, Adams, D L, Adams, M, Ahmed, S N, Alexeev, G D, Alton, A, Alves, G A, Anderson, E W, Arnoud, Y, Avila, C, Babintsev, V V, Babukhadia, L, Bacon, T C, Baden, A, Baffioni, S, Baldin, B, Balm, P W, Banerjee, S, Barberis, E, Baringer, P, Barreto, J, Bartlett, J F, Bassler, U, Bauer, D, Bean, A, Beaudette, F, Begel, M, Belyaev, A, Beri, S B, Bernardi, G, Bertram, I, Besson, A, Beuselinck, R, Bezzubov, V A, Bhat, P C, Bhatnagar, V, Bhattacharjee, M, Blazey, G, Blekman, F, Blessing, S, Boehnlein, A, Bojko, N I, Bolton, T A, Borcherding, F, Bos, K, Bose, T, Brandt, A, Briskin, G, Brock, R, Brooijmans, G, Bross, A, Buchholz, D, Buehler, M, Buescher, V, Burtovoi, V S, Butler, J M, Canelli, F, Carvalho, W, Casey, D, Castilla-Valdez, H, Chakraborty, D, Chan, K M, Chekulaev, S V, Cho, D K, Choi, S, Chopra, S, Claes, D, Clark, A R, Connolly, B, Cooper, W E, Coppage, D, Crépé-Renaudin, S, Cummings, M A C, Cutts, D, da Motta, H, Davis, G A, De, K, de Jong, S J, Demarteau, M, Demina, R, Demine, P, Denisov, D, Denisov, S P, Desai, S, Diehl, H T, Diesburg, M, Doulas, S, Dudko, L V, Duensing, S, Duflot, L, Dugad, S R, Duperrin, A, Dyshkant, A, Edmunds, D, Ellison, J
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Language:English
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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
ISSN:0031-9007