Third-generation leptoquark decays and collider searches

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Collider searches for first-, second-, and third-generation scalar (S) or vector (V) leptoquarks (LQs) focus on the quark-lepton decay modes S,V → q l. For SU(2)-doublet and -triplet leptoquarks with a sufficiently large splitting between the components, decays involving real W-boson emission (such as S(+ 5/3) 2 → S(+ 2/3) 2 W+ and others) become possible and can change the patterns of leptoquark decays. For third-generation leptoquarks, where these mass splittings might be large, such modes could dominate certain leptoquark decays as they are (if kinematically allowed) guaranteed to be of order g2 where g is the electroweak coupling. We calculate the decay rates for all such processes involving SU(2)-doublet and triplet, scalar and vector leptoquarks. Standard limits on mass splittings from precision electroweak measurements imply that only such decays involving SU(2)-doublet scalar LQs are likely kinematically possible.

Original languageEnglish (US)
Pages (from-to)107-111
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume411
Issue number1-2
DOIs
StatePublished - Oct 9 1997

Fingerprint

decay
scalars
decay rates
leptons
bosons
quarks

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

@article{300d6ec0076045319d5f01255970c0e1,
title = "Third-generation leptoquark decays and collider searches",
abstract = "Collider searches for first-, second-, and third-generation scalar (S) or vector (V) leptoquarks (LQs) focus on the quark-lepton decay modes S,V → q l. For SU(2)-doublet and -triplet leptoquarks with a sufficiently large splitting between the components, decays involving real W-boson emission (such as S(+ 5/3) 2 → S(+ 2/3) 2 W+ and others) become possible and can change the patterns of leptoquark decays. For third-generation leptoquarks, where these mass splittings might be large, such modes could dominate certain leptoquark decays as they are (if kinematically allowed) guaranteed to be of order g2 where g is the electroweak coupling. We calculate the decay rates for all such processes involving SU(2)-doublet and triplet, scalar and vector leptoquarks. Standard limits on mass splittings from precision electroweak measurements imply that only such decays involving SU(2)-doublet scalar LQs are likely kinematically possible.",
author = "Michael Doncheski and Robinett, {Richard Wallace}",
year = "1997",
month = "10",
day = "9",
doi = "10.1016/S0370-2693(97)01015-0",
language = "English (US)",
volume = "411",
pages = "107--111",
journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
issn = "0370-2693",
publisher = "Elsevier",
number = "1-2",

}

TY - JOUR

T1 - Third-generation leptoquark decays and collider searches

AU - Doncheski, Michael

AU - Robinett, Richard Wallace

PY - 1997/10/9

Y1 - 1997/10/9

N2 - Collider searches for first-, second-, and third-generation scalar (S) or vector (V) leptoquarks (LQs) focus on the quark-lepton decay modes S,V → q l. For SU(2)-doublet and -triplet leptoquarks with a sufficiently large splitting between the components, decays involving real W-boson emission (such as S(+ 5/3) 2 → S(+ 2/3) 2 W+ and others) become possible and can change the patterns of leptoquark decays. For third-generation leptoquarks, where these mass splittings might be large, such modes could dominate certain leptoquark decays as they are (if kinematically allowed) guaranteed to be of order g2 where g is the electroweak coupling. We calculate the decay rates for all such processes involving SU(2)-doublet and triplet, scalar and vector leptoquarks. Standard limits on mass splittings from precision electroweak measurements imply that only such decays involving SU(2)-doublet scalar LQs are likely kinematically possible.

AB - Collider searches for first-, second-, and third-generation scalar (S) or vector (V) leptoquarks (LQs) focus on the quark-lepton decay modes S,V → q l. For SU(2)-doublet and -triplet leptoquarks with a sufficiently large splitting between the components, decays involving real W-boson emission (such as S(+ 5/3) 2 → S(+ 2/3) 2 W+ and others) become possible and can change the patterns of leptoquark decays. For third-generation leptoquarks, where these mass splittings might be large, such modes could dominate certain leptoquark decays as they are (if kinematically allowed) guaranteed to be of order g2 where g is the electroweak coupling. We calculate the decay rates for all such processes involving SU(2)-doublet and triplet, scalar and vector leptoquarks. Standard limits on mass splittings from precision electroweak measurements imply that only such decays involving SU(2)-doublet scalar LQs are likely kinematically possible.

UR - http://www.scopus.com/inward/record.url?scp=0346250484&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0346250484&partnerID=8YFLogxK

U2 - 10.1016/S0370-2693(97)01015-0

DO - 10.1016/S0370-2693(97)01015-0

M3 - Article

VL - 411

SP - 107

EP - 111

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

SN - 0370-2693

IS - 1-2

ER -