Width effects on near threshold decays of the top quark t -> cWW,cZZ and of neutral Higgs bosons

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2005-09-01

Author

Bar-Shalom, S
Eilam, G
Frank, M
Turan, İsmail

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The nonzero widths of heavy particles become significant when they appear in the final state of any decay occurring just around its kinematical threshold. To take into account such effects, a procedure, called the convolution method, was proposed by Altarelli, Conti, and Lubicz. We expand their study which included only threshold effects for t -> bWZ in the standard model. We discuss finite width effects in the three-body decays t -> cWW,cZZ and A(0)(h(0))-> tbW in the type III version of a two-Higgs doublet model. In particular, we find a substantial enhancement in the decay t -> cZZ, which brings its branching ratio to BR(t -> cZZ)similar to 10(-3), and in the decay A(0)-> tbW, which, unlike the h(0) case, becomes competitive with the A(0) two-body decay modes.

Subject Keywords

Nuclear and High Energy Physics

URI

https://hdl.handle.net/11511/45973

Journal

PHYSICAL REVIEW D

DOI

https://doi.org/10.1103/physrevd.72.055018

Collections

Department of Physics, Article

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Citation Formats

S. Bar-Shalom, G. Eilam, M. Frank, and İ. Turan, “Width effects on near threshold decays of the top quark t -> cWW,cZZ and of neutral Higgs bosons,” PHYSICAL REVIEW D, pp. 0–0, 2005, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/45973.