The Phenomenology of Single Top Quark Production at the Fermilab Tevatron
نویسنده
چکیده
Single top quark production at the Fermilab Tevatron Run II (a pp̄ collider with √ S = 2 TeV) proceeds dominantly via two sub-processes, a t-channel W -gluon fusion process, and an s-channel W ∗ process. We show that these two subprocesses have different sensitivities to new physics effects in the top quark’s electro-weak interactions. The W ∗ process is sensitive to new heavy charged resonances, such as a W ′ boson, while the W -gluon fusion process is more sensitive to modifications to the top’s interaction, including flavor-changing neutral currents involving the top quark. We examine the implications of these results on our ability to measure Vtb with confidence, and propose a quantity R = σWg/σW ∗ , which may be studied in order to characterize the confidence one may place upon a given measurement of Vtb from single top production. PACS numbers: 14.65.Ha, 12.39.Fe, 12.60.-i † Also at Argonne National Laboratory, HEP Division, 9700 South Cass Avenue, Argonne, IL 60439.
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تاریخ انتشار 1997