In Search of Lonely Top Quarks at the Tevatron

Details In Search of Lonely Top Quarks at the Tevatron In Search of Lonely Top Quarks at the Tevatron

2004-12-16

arxiv.org/abs/hep-ph/0412223v2

Phys.Rev. D72 (2005) 074016

Physics

High Energy Physics

High Energy Physics - Phenomenology

25 pages, 9 figures; 3 minor typos corrected, 1 reference added, minor editorial improvements in figures 1 and 7

Scientific paper

Single top-quark production, via weak-interaction processes, is an important test of the standard model, potentially sensitive to new physics. However, it is becoming known that this measurement is much more challenging at the Tevatron than originally expected. We reexamine this process and suggest new methods, using shape variables, that can supplement the methods that have been discussed previously. In particular, by focusing on correlations and asymmetries, we can reduce backgrounds substantially without low acceptance for the signal. Our method also allows for a self-consistency check on the modeling of the backgrounds. However, at the present time, serious systematic problems remain, especially concerning the background from W-plus-jets; these must be studied further by experimentalists and theorists alike.

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