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Title: Higgs-boson decay to four fermions including a single top quark below [ital t[bar t]] threshold

Abstract

The rare decay modes Higgs boson[r arrow]four light fermions and Higgs boson[r arrow]single top quark+three light fermions for [ital m][sub [ital t]][lt][ital M][sub [ital H]][lt]2[ital m][sub [ital t]] are presented, and phenomenologically interpreted. The angular correlation between fermion planes is presented as a test of the spin and intrinsic parity of the Higgs particle. In Higgs-boson decay to a single top quark, two tree-level graphs contribute in the standard model (SM); one couples the Higgs boson to [ital W][sup +][ital W[minus]] ([similar to][ital gM][sub [ital W]]), and one to [ital t[bar t]] ([similar to][ital g][sub top] Yukawa=[ital m][sub [ital t]]/246 GeV). The large Yukawa coupling for [ital m][sub [ital t]][gt]100 GeV makes the second amplitude competitive or dominant for most [ital M][sub [ital H]], [ital m][sub [ital t]] values. Thus the Higgs-boson decay rate to a single top quark directly probes the SM universal mechanism generating both gauge-boson and fermion masses, and offers a means to infer the Higgs-boson--[ital t[bar t]] Yukawa coupling when [ital H][r arrow][ital t[bar t]] is kinematically disallowed. We find that the modes [ital pp][r arrow][ital Xt[bar t]]([ital H][r arrow][ital t[bar b]W][sup (*)]) at the Superconducting Supe r Collider, and [ital e][sup +][ital e[minus]][r arrow][ital Z]more » or [nu][bar [nu]]+([ital H][r arrow][ital t[bar b]W][sup (*)]) at future high-energy, high-luminosity colliders, may be measurable if 2[ital m][sub [ital t]] is not too far above [ital M][sub [ital H]]. We classify nonstandard Higgs-bosons as gaugeophobic, fermiophobic, or fermiophilic, and discuss the Higgs boson [r arrow] single top-quark rates for these classes.« less

Authors:
 [1];  [2];  [3]
  1. Center for Theoretical Physics, Department of Physics, Texas A M University, College Station, Texas 77843-4242 (United States) Astroparticle Physics Group, Houston Advanced Research Center (HARC), The Woodlands, Texas 77381 (United States)
  2. Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235 (United States)
  3. Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208 (United States)
Publication Date:
OSTI Identifier:
6606808
DOE Contract Number:  
FG05-85ER40226; FG03-84ER40168
Resource Type:
Journal Article
Journal Name:
Physical Review, D (Particles Fields); (United States)
Additional Journal Information:
Journal Volume: 47:9; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; HIGGS BOSONS; HADRONIC PARTICLE DECAY; COUPLING CONSTANTS; MASS; PARAMETRIC ANALYSIS; PROTON-PROTON INTERACTIONS; STANDARD MODEL; TOP PARTICLES; BARYON-BARYON INTERACTIONS; DECAY; ELEMENTARY PARTICLES; HADRON-HADRON INTERACTIONS; INTERACTIONS; MATHEMATICAL MODELS; NUCLEON-NUCLEON INTERACTIONS; PARTICLE DECAY; PARTICLE INTERACTIONS; PARTICLE MODELS; POSTULATED PARTICLES; PROTON-NUCLEON INTERACTIONS; UNIFIED GAUGE MODELS; 662440* - Properties of Other Particles Including Hypothetical Particles- (1992-); 662340 - Hadron Interactions- (1992-)

Citation Formats

Pois, H, Weiler, T J, and Yuan, T C. Higgs-boson decay to four fermions including a single top quark below [ital t[bar t]] threshold. United States: N. p., 1993. Web. doi:10.1103/PhysRevD.47.3886.
Pois, H, Weiler, T J, & Yuan, T C. Higgs-boson decay to four fermions including a single top quark below [ital t[bar t]] threshold. United States. https://doi.org/10.1103/PhysRevD.47.3886
Pois, H, Weiler, T J, and Yuan, T C. 1993. "Higgs-boson decay to four fermions including a single top quark below [ital t[bar t]] threshold". United States. https://doi.org/10.1103/PhysRevD.47.3886.
@article{osti_6606808,
title = {Higgs-boson decay to four fermions including a single top quark below [ital t[bar t]] threshold},
author = {Pois, H and Weiler, T J and Yuan, T C},
abstractNote = {The rare decay modes Higgs boson[r arrow]four light fermions and Higgs boson[r arrow]single top quark+three light fermions for [ital m][sub [ital t]][lt][ital M][sub [ital H]][lt]2[ital m][sub [ital t]] are presented, and phenomenologically interpreted. The angular correlation between fermion planes is presented as a test of the spin and intrinsic parity of the Higgs particle. In Higgs-boson decay to a single top quark, two tree-level graphs contribute in the standard model (SM); one couples the Higgs boson to [ital W][sup +][ital W[minus]] ([similar to][ital gM][sub [ital W]]), and one to [ital t[bar t]] ([similar to][ital g][sub top] Yukawa=[ital m][sub [ital t]]/246 GeV). The large Yukawa coupling for [ital m][sub [ital t]][gt]100 GeV makes the second amplitude competitive or dominant for most [ital M][sub [ital H]], [ital m][sub [ital t]] values. Thus the Higgs-boson decay rate to a single top quark directly probes the SM universal mechanism generating both gauge-boson and fermion masses, and offers a means to infer the Higgs-boson--[ital t[bar t]] Yukawa coupling when [ital H][r arrow][ital t[bar t]] is kinematically disallowed. We find that the modes [ital pp][r arrow][ital Xt[bar t]]([ital H][r arrow][ital t[bar b]W][sup (*)]) at the Superconducting Supe r Collider, and [ital e][sup +][ital e[minus]][r arrow][ital Z] or [nu][bar [nu]]+([ital H][r arrow][ital t[bar b]W][sup (*)]) at future high-energy, high-luminosity colliders, may be measurable if 2[ital m][sub [ital t]] is not too far above [ital M][sub [ital H]]. We classify nonstandard Higgs-bosons as gaugeophobic, fermiophobic, or fermiophilic, and discuss the Higgs boson [r arrow] single top-quark rates for these classes.},
doi = {10.1103/PhysRevD.47.3886},
url = {https://www.osti.gov/biblio/6606808}, journal = {Physical Review, D (Particles Fields); (United States)},
issn = {0556-2821},
number = ,
volume = 47:9,
place = {United States},
year = {Sat May 01 00:00:00 EDT 1993},
month = {Sat May 01 00:00:00 EDT 1993}
}