TY - JOUR
T1 - Third-generation leptoquark decays and collider searches
AU - Doncheski, M. A.
AU - Robinett, R. W.
N1 - Funding Information:
We thank T. Rizzo for communications about precision electroweak limits and leptoquarks and J. March-Russell for communications regarding Ref. [6]. One of us (M.A.D) acknowledgest he support of Penn State University through a Research Development Grant (RDG).
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.
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U2 - 10.1016/S0370-2693(97)01015-0
DO - 10.1016/S0370-2693(97)01015-0
M3 - Article
AN - SCOPUS:0346250484
SN - 0370-2693
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
IS - 1-2
ER -