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Title: Heavy quark signals from radiative corrections to the Z{sup '} boson decay in 3-3-1 models

Abstract

One-loop corrections to the Z{sup '} decay width are derived and analyzed in the framework of the general form of the 3-3-1 models. We identify two important sources of corrections: oblique corrections associated to the Z{sup '} propagator through vacuum polarizations induced by virtual particle-antiparticle pairs of new heavy quarks J, and vertex corrections to the Z{sup '}qq vertex through virtual exchange of new K{sup Q{sub 1,2}} gauge bosons. Fixing a specific renormalization scheme, we obtain dominant oblique corrections that exhibit a quadratic dependence on the J quark mass, which are absorbed into two oblique parameters: a global parameter {rho}{sub f}{sup '} which modify the Z{sup '} decay width, and a parameter {kappa}{sub f}{sup '} that define effective Z{sup '} couplings. Numerical results in an specific 3-3-1 model gives a strong contribution of the oblique corrections from about 1.3% in the d(s) quark channel to 10.5% in the neutrino channel, for m{sub J}=2 TeV. The vertex corrections contribute to the oblique corrections up to 1.4% for the same channel and m{sub J} value. For pp collisions at the CERN LHC collider, we find that the corrections significantly modify the shape of the cross section distributions for e{sup +}e{sup -} andmore » tt final states, where the distributions including the radiative corrections increases up to 1.23 times the tree-level distribution for the dielectron events and to 1.07 for the top events when m{sub J}=3 TeV.« less

Authors:
;  [1]
  1. Departamento de Fisica, Universidad Nacional, Bogota (Colombia)
Publication Date:
OSTI Identifier:
21325280
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 80; Journal Issue: 7; Other Information: DOI: 10.1103/PhysRevD.80.075020; (c) 2009 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; B QUARKS; BOSONS; C QUARKS; CERN LHC; COUPLING; CROSS SECTIONS; DISTRIBUTION; MASS; NEUTRINOS; PARTICLE DECAY; PROPAGATOR; PROTON-PROTON INTERACTIONS; RADIATIVE CORRECTIONS; RENORMALIZATION; S QUARKS; SIMULATION; T QUARKS; TEV RANGE 01-10; VACUUM POLARIZATION

Citation Formats

Martinez, R, and Ochoa, F. Heavy quark signals from radiative corrections to the Z{sup '} boson decay in 3-3-1 models. United States: N. p., 2009. Web. doi:10.1103/PHYSREVD.80.075020.
Martinez, R, & Ochoa, F. Heavy quark signals from radiative corrections to the Z{sup '} boson decay in 3-3-1 models. United States. doi:10.1103/PHYSREVD.80.075020.
Martinez, R, and Ochoa, F. Thu . "Heavy quark signals from radiative corrections to the Z{sup '} boson decay in 3-3-1 models". United States. doi:10.1103/PHYSREVD.80.075020.
@article{osti_21325280,
title = {Heavy quark signals from radiative corrections to the Z{sup '} boson decay in 3-3-1 models},
author = {Martinez, R and Ochoa, F},
abstractNote = {One-loop corrections to the Z{sup '} decay width are derived and analyzed in the framework of the general form of the 3-3-1 models. We identify two important sources of corrections: oblique corrections associated to the Z{sup '} propagator through vacuum polarizations induced by virtual particle-antiparticle pairs of new heavy quarks J, and vertex corrections to the Z{sup '}qq vertex through virtual exchange of new K{sup Q{sub 1,2}} gauge bosons. Fixing a specific renormalization scheme, we obtain dominant oblique corrections that exhibit a quadratic dependence on the J quark mass, which are absorbed into two oblique parameters: a global parameter {rho}{sub f}{sup '} which modify the Z{sup '} decay width, and a parameter {kappa}{sub f}{sup '} that define effective Z{sup '} couplings. Numerical results in an specific 3-3-1 model gives a strong contribution of the oblique corrections from about 1.3% in the d(s) quark channel to 10.5% in the neutrino channel, for m{sub J}=2 TeV. The vertex corrections contribute to the oblique corrections up to 1.4% for the same channel and m{sub J} value. For pp collisions at the CERN LHC collider, we find that the corrections significantly modify the shape of the cross section distributions for e{sup +}e{sup -} and tt final states, where the distributions including the radiative corrections increases up to 1.23 times the tree-level distribution for the dielectron events and to 1.07 for the top events when m{sub J}=3 TeV.},
doi = {10.1103/PHYSREVD.80.075020},
journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 7,
volume = 80,
place = {United States},
year = {2009},
month = {10}
}