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Title: Rare t-quark decays t {sup {yields}} cl{sub j}{sup +}l{sub k}{sup -} and t {sup {yields}} cv-tilde {sub j}v{sub k} induced by doublets of scalar leptoquarks within the minimal four-color-symmetry model

Abstract

The rare t-quark decays t {sup {yields}} cl{sub j}{sup +}l{sub k}{sup -} and t {sup {yields}} cv-tilde {sub j}k{sub k} induced by scalar-leptoquark doublets are considered within the minimal model involving four-color quark-lepton symmetry and the Higgs mechanism of quark and lepton mass splitting. The partial widths with respect to the decays being considered and the total widths {gamma}(t {sup {yields}} cl{sup +}'l{sup -}) {sigma}{sub j,k} {gamma}(t {sup {yields}} cl{sub j}{sup +}l{sub k}{sup -}) and {gamma}(t {sup {yields}} cl{sup +}'l{sup -}) {sigma}{sub j,k}{gamma}(t {sup {yields}} cv-tilde {sub j}v{sub k}) with respect to, respectively, the charged leptonic and neutrino modes are calculated. It is shown that, at scalar-leptoquark masses higher than the t-quark mass (m{sub S} > m{sub t}), the branching ratios for these modes are Br(t {sup {yields}} cl{sup +}'l{sup -}) {approx} (3.5-0.4) x 10{sup -5} and Br(t {sup {yields}} cv-tilde 'v) {approx} (7.1-0.8) x 10{sup -5} at m{sub s} 180-250 GeV and an appropriate value of the leptoquark-mixing angle (sin {beta} {approx} 0.2) and can increase for m{sub S} < m{sub t} to Br(t {sup {yields}} cl{sup +}'l{sup -}) {approx} 0.03-0.002 and Br(t {sup {yields}} cl{sup +}'l{sup -}) {approx} 0.46-0.05 for the charged mode at m{sub S} = 150-170more » GeV for sin {beta} {approx} 1 and sin {beta} {approx} 0.2, respectively. In the cases being considered, t-quark decays to pairs of charged leptons can be accessible to detection at LHC. In the last case, these decays could manifest themselves (for example, in dilepton events) at the Tevatron as well.« less

Authors:
;  [1]
  1. Yaroslavl State University (Russian Federation), E-mail: asmirnov@univ.uniyar.ac.ru
Publication Date:
OSTI Identifier:
21076052
Resource Type:
Journal Article
Journal Name:
Physics of Atomic Nuclei
Additional Journal Information:
Journal Volume: 69; Journal Issue: 6; Other Information: DOI: 10.1134/S1063778806060081; Copyright (c) 2006 Nauka/Interperiodica; Article Copyright (c) 2006 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1063-7788
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BRANCHING RATIO; CERN LHC; CHLORINE IONS; COLOR MODEL; FERMILAB TEVATRON; GEV RANGE 100-1000; HIGGS BOSONS; HIGGS MODEL; MASS; NEUTRINOS; PARTICLE DECAY; SCALARS; SIMULATION; SYMMETRY; T QUARKS; WEINBERG ANGLE

Citation Formats

Popov, P. Yu., E-mail: popov_p@univ.uniyar.ac.ru, and Smirnov, A. D. Rare t-quark decays t {sup {yields}} cl{sub j}{sup +}l{sub k}{sup -} and t {sup {yields}} cv-tilde {sub j}v{sub k} induced by doublets of scalar leptoquarks within the minimal four-color-symmetry model. United States: N. p., 2006. Web. doi:10.1134/S1063778806060081.
Popov, P. Yu., E-mail: popov_p@univ.uniyar.ac.ru, & Smirnov, A. D. Rare t-quark decays t {sup {yields}} cl{sub j}{sup +}l{sub k}{sup -} and t {sup {yields}} cv-tilde {sub j}v{sub k} induced by doublets of scalar leptoquarks within the minimal four-color-symmetry model. United States. https://doi.org/10.1134/S1063778806060081
Popov, P. Yu., E-mail: popov_p@univ.uniyar.ac.ru, and Smirnov, A. D. Thu . "Rare t-quark decays t {sup {yields}} cl{sub j}{sup +}l{sub k}{sup -} and t {sup {yields}} cv-tilde {sub j}v{sub k} induced by doublets of scalar leptoquarks within the minimal four-color-symmetry model". United States. https://doi.org/10.1134/S1063778806060081.
@article{osti_21076052,
title = {Rare t-quark decays t {sup {yields}} cl{sub j}{sup +}l{sub k}{sup -} and t {sup {yields}} cv-tilde {sub j}v{sub k} induced by doublets of scalar leptoquarks within the minimal four-color-symmetry model},
author = {Popov, P. Yu., E-mail: popov_p@univ.uniyar.ac.ru and Smirnov, A. D.},
abstractNote = {The rare t-quark decays t {sup {yields}} cl{sub j}{sup +}l{sub k}{sup -} and t {sup {yields}} cv-tilde {sub j}k{sub k} induced by scalar-leptoquark doublets are considered within the minimal model involving four-color quark-lepton symmetry and the Higgs mechanism of quark and lepton mass splitting. The partial widths with respect to the decays being considered and the total widths {gamma}(t {sup {yields}} cl{sup +}'l{sup -}) {sigma}{sub j,k} {gamma}(t {sup {yields}} cl{sub j}{sup +}l{sub k}{sup -}) and {gamma}(t {sup {yields}} cl{sup +}'l{sup -}) {sigma}{sub j,k}{gamma}(t {sup {yields}} cv-tilde {sub j}v{sub k}) with respect to, respectively, the charged leptonic and neutrino modes are calculated. It is shown that, at scalar-leptoquark masses higher than the t-quark mass (m{sub S} > m{sub t}), the branching ratios for these modes are Br(t {sup {yields}} cl{sup +}'l{sup -}) {approx} (3.5-0.4) x 10{sup -5} and Br(t {sup {yields}} cv-tilde 'v) {approx} (7.1-0.8) x 10{sup -5} at m{sub s} 180-250 GeV and an appropriate value of the leptoquark-mixing angle (sin {beta} {approx} 0.2) and can increase for m{sub S} < m{sub t} to Br(t {sup {yields}} cl{sup +}'l{sup -}) {approx} 0.03-0.002 and Br(t {sup {yields}} cl{sup +}'l{sup -}) {approx} 0.46-0.05 for the charged mode at m{sub S} = 150-170 GeV for sin {beta} {approx} 1 and sin {beta} {approx} 0.2, respectively. In the cases being considered, t-quark decays to pairs of charged leptons can be accessible to detection at LHC. In the last case, these decays could manifest themselves (for example, in dilepton events) at the Tevatron as well.},
doi = {10.1134/S1063778806060081},
url = {https://www.osti.gov/biblio/21076052}, journal = {Physics of Atomic Nuclei},
issn = {1063-7788},
number = 6,
volume = 69,
place = {United States},
year = {2006},
month = {6}
}