A search for single-top production, ep --> et X, has been made with the ZEUS detector at HERA using an integrated luminosity of 130.1 pb(-1). Events from both the leptonic and hadronic decay channels of the W boson resulting from the decay of the top quark were sought. For the leptonic mode, the search was made for events with isolated high-energy leptons and significant missing transverse momentum. For the hadronic decay mode, three-jet events in which two of the jets had an invariant mass consistent with that of the W were selected. No evidence for top production was found. The results are used to constrain single-top production via flavour-changing neutral current (FCNC) transitions. The ZEUS limit excludes a substantial region in the FCNC tugamma coupling not ruled out by other experiments. (C) 2003 Published by Elsevier Science B.V.

A search for single-top production, ep --> et X, has been made with the ZEUS detector at HERA using an integrated luminosity of 130.1 pb(-1). Events from both the leptonic and hadronic decay channels of the W boson resulting from the decay of the top quark were sought. For the leptonic mode, the search was made for events with isolated high-energy leptons and significant missing transverse momentum. For the hadronic decay mode, three-jet events in which two of the jets had an invariant mass consistent with that of the W were selected. No evidence for top production was found. The results are used to constrain single-top production via flavour-changing neutral current (FCNC) transitions. The ZEUS limit excludes a substantial region in the FCNC tugamma coupling not ruled out by other experiments. (C) 2003 Published by Elsevier Science B.V.

Search for single-top production in ep collisions at HERA

CAPUA, Marcella;MASTROBERARDINO, Anna;Schioppa M;TASSI, Enrico;
2003-01-01

Abstract

A search for single-top production, ep --> et X, has been made with the ZEUS detector at HERA using an integrated luminosity of 130.1 pb(-1). Events from both the leptonic and hadronic decay channels of the W boson resulting from the decay of the top quark were sought. For the leptonic mode, the search was made for events with isolated high-energy leptons and significant missing transverse momentum. For the hadronic decay mode, three-jet events in which two of the jets had an invariant mass consistent with that of the W were selected. No evidence for top production was found. The results are used to constrain single-top production via flavour-changing neutral current (FCNC) transitions. The ZEUS limit excludes a substantial region in the FCNC tugamma coupling not ruled out by other experiments. (C) 2003 Published by Elsevier Science B.V.
2003
A search for single-top production, ep --> et X, has been made with the ZEUS detector at HERA using an integrated luminosity of 130.1 pb(-1). Events from both the leptonic and hadronic decay channels of the W boson resulting from the decay of the top quark were sought. For the leptonic mode, the search was made for events with isolated high-energy leptons and significant missing transverse momentum. For the hadronic decay mode, three-jet events in which two of the jets had an invariant mass consistent with that of the W were selected. No evidence for top production was found. The results are used to constrain single-top production via flavour-changing neutral current (FCNC) transitions. The ZEUS limit excludes a substantial region in the FCNC tugamma coupling not ruled out by other experiments. (C) 2003 Published by Elsevier Science B.V.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11770/126953
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