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Search for anomalous top quark production at HERA |
| Reference |
N.N., to be presented at DIS 2002, Spring 2002 |
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| Contact |
C.Diaconu, J.Dingfelder |
| Abstract |
A search for anomalous top quark production mediated by a flavour changing neutral current via a gamma-u-t coupling is performed in e^+- p collisions at HERA. The search exploits data collected from 1994 to 2000 and is motivated by the previous observation of outstanding events with isolated leptons, missing transverse momentum and a jet with large transverse momentum. The top decay into a b-jet and a W-boson is considered in both the leptonic and hadronic decay modes of the W. The data is compared to the Standard Model expectation and to an anomalous top production model in the framework of a multivariate analysis. An upper limit on the anomalous gamma-u-t coupling is established in a region of parameter space not excluded by other experiments. |
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