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Title: Width effects on near threshold decays of the top quark t{yields}cWW,cZZ and of neutral Higgs bosons

Abstract

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{yields}bWZ in the standard model. We discuss finite width effects in the three-body decays t{yields}cWW,cZZ and A{sup 0}(h{sup 0}){yields}tbW in the type III version of a two-Higgs doublet model. In particular, we find a substantial enhancement in the decay t{yields}cZZ, which brings its branching ratio to BR(t{yields}cZZ){approx}10{sup -3}, and in the decay A{sup 0}{yields}tbW, which, unlike the h{sup 0} case, becomes competitive with the A{sup 0} two-body decay modes.

Authors:
 [1];  [1];  [2];  [2]
  1. Department of Physics, Technion-Israel Institute of Technology, 32000 Haifa (Israel)
  2. Department of Physics, Concordia University, 7141 Sherbrooke Street West, Montreal, Quebec, H4B 1R6 (Canada)
Publication Date:
OSTI Identifier:
20711488
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 72; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevD.72.055018; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BRANCHING RATIO; C QUARKS; HIGGS BOSONS; HIGGS MODEL; PARTICLE DECAY; STANDARD MODEL; T QUARKS; THREE-BODY PROBLEM; TWO-BODY PROBLEM; W MINUS BOSONS; W PLUS BOSONS; Z NEUTRAL BOSONS

Citation Formats

Bar-Shalom, Shaouly, Eilam, Gad, Department of Physics, University of Wisconsin, Madison, Wisconsin 53706, Frank, Mariana, Turan, Ismail, and Particle Theory Group, Department of Physics, College of William and Mary, Williamsburg, Virginia 23187-8795. Width effects on near threshold decays of the top quark t{yields}cWW,cZZ and of neutral Higgs bosons. United States: N. p., 2005. Web. doi:10.1103/PhysRevD.72.055018.
Bar-Shalom, Shaouly, Eilam, Gad, Department of Physics, University of Wisconsin, Madison, Wisconsin 53706, Frank, Mariana, Turan, Ismail, & Particle Theory Group, Department of Physics, College of William and Mary, Williamsburg, Virginia 23187-8795. Width effects on near threshold decays of the top quark t{yields}cWW,cZZ and of neutral Higgs bosons. United States. https://doi.org/10.1103/PhysRevD.72.055018
Bar-Shalom, Shaouly, Eilam, Gad, Department of Physics, University of Wisconsin, Madison, Wisconsin 53706, Frank, Mariana, Turan, Ismail, and Particle Theory Group, Department of Physics, College of William and Mary, Williamsburg, Virginia 23187-8795. 2005. "Width effects on near threshold decays of the top quark t{yields}cWW,cZZ and of neutral Higgs bosons". United States. https://doi.org/10.1103/PhysRevD.72.055018.
@article{osti_20711488,
title = {Width effects on near threshold decays of the top quark t{yields}cWW,cZZ and of neutral Higgs bosons},
author = {Bar-Shalom, Shaouly and Eilam, Gad and Department of Physics, University of Wisconsin, Madison, Wisconsin 53706 and Frank, Mariana and Turan, Ismail and Particle Theory Group, Department of Physics, College of William and Mary, Williamsburg, Virginia 23187-8795},
abstractNote = {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{yields}bWZ in the standard model. We discuss finite width effects in the three-body decays t{yields}cWW,cZZ and A{sup 0}(h{sup 0}){yields}tbW in the type III version of a two-Higgs doublet model. In particular, we find a substantial enhancement in the decay t{yields}cZZ, which brings its branching ratio to BR(t{yields}cZZ){approx}10{sup -3}, and in the decay A{sup 0}{yields}tbW, which, unlike the h{sup 0} case, becomes competitive with the A{sup 0} two-body decay modes.},
doi = {10.1103/PhysRevD.72.055018},
url = {https://www.osti.gov/biblio/20711488}, journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 5,
volume = 72,
place = {United States},
year = {Thu Sep 01 00:00:00 EDT 2005},
month = {Thu Sep 01 00:00:00 EDT 2005}
}