New low-energy leptoquark interactions

M. Hirsch; H. V. Klapdor-Kleingrothaus; S. G. Kovalenko

doi:10.1016/0370-2693(96)00419-4

New low-energy leptoquark interactions

M. Hirsch, H. V. Klapdor-Kleingrothaus, S. G. Kovalenko

Research output: Contribution to journal › Article › peer-review

69 Citations (Scopus)

Abstract

We discuss an extension of the standard model (SM) with vector and scalar leptoquarks. The renormalizable leptoquark Lagrangian consistent with the SM gauge symmetry is presented including the leptoquark-Higgs interactions previously not considered in the literature. We discuss the importance of these new interactions for leptoquark phenomenology. After the electro-weak symmetry breaking they generate non-trivial leptoquark mass matrices. These lead to mixing between different SU(2)_L-multiplets of the leptoquarks and induce at low energies new effective 4-fermion lepton-quark vertices. The latter affect the standard leptoquark phenomenology. We discuss constraints on these interactions from the helicity-suppressed π → ν + e decay.

Original language	English
Pages (from-to)	17-22
Number of pages	6
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	378
Issue number	1-4
DOIs	https://doi.org/10.1016/0370-2693(96)00419-4
Publication status	Published - 20 Jun 1996
Externally published	Yes

Keywords

Effective interaction
Higgs
Leptoquarks
Non-chiral
Pion decay

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/0370-2693(96)00419-4

Cite this

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title = "New low-energy leptoquark interactions",

abstract = "We discuss an extension of the standard model (SM) with vector and scalar leptoquarks. The renormalizable leptoquark Lagrangian consistent with the SM gauge symmetry is presented including the leptoquark-Higgs interactions previously not considered in the literature. We discuss the importance of these new interactions for leptoquark phenomenology. After the electro-weak symmetry breaking they generate non-trivial leptoquark mass matrices. These lead to mixing between different SU(2)L-multiplets of the leptoquarks and induce at low energies new effective 4-fermion lepton-quark vertices. The latter affect the standard leptoquark phenomenology. We discuss constraints on these interactions from the helicity-suppressed π → ν + e decay.",

keywords = "Effective interaction, Higgs, Leptoquarks, Non-chiral, Pion decay",

author = "M. Hirsch and Klapdor-Kleingrothaus, {H. V.} and Kovalenko, {S. G.}",

note = "Funding Information: We thank V.A. Bednyakov for helpful discussions. M.H. would like to thank the Deutsche Forschungsge-meinschaft for financial support by grants kl 253/8-l and 446 JAP-113/101/O.",

year = "1996",

month = jun,

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doi = "10.1016/0370-2693(96)00419-4",

language = "English",

volume = "378",

pages = "17--22",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier",

number = "1-4",

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TY - JOUR

T1 - New low-energy leptoquark interactions

AU - Hirsch, M.

AU - Klapdor-Kleingrothaus, H. V.

AU - Kovalenko, S. G.

N1 - Funding Information: We thank V.A. Bednyakov for helpful discussions. M.H. would like to thank the Deutsche Forschungsge-meinschaft for financial support by grants kl 253/8-l and 446 JAP-113/101/O.

PY - 1996/6/20

Y1 - 1996/6/20

N2 - We discuss an extension of the standard model (SM) with vector and scalar leptoquarks. The renormalizable leptoquark Lagrangian consistent with the SM gauge symmetry is presented including the leptoquark-Higgs interactions previously not considered in the literature. We discuss the importance of these new interactions for leptoquark phenomenology. After the electro-weak symmetry breaking they generate non-trivial leptoquark mass matrices. These lead to mixing between different SU(2)L-multiplets of the leptoquarks and induce at low energies new effective 4-fermion lepton-quark vertices. The latter affect the standard leptoquark phenomenology. We discuss constraints on these interactions from the helicity-suppressed π → ν + e decay.

AB - We discuss an extension of the standard model (SM) with vector and scalar leptoquarks. The renormalizable leptoquark Lagrangian consistent with the SM gauge symmetry is presented including the leptoquark-Higgs interactions previously not considered in the literature. We discuss the importance of these new interactions for leptoquark phenomenology. After the electro-weak symmetry breaking they generate non-trivial leptoquark mass matrices. These lead to mixing between different SU(2)L-multiplets of the leptoquarks and induce at low energies new effective 4-fermion lepton-quark vertices. The latter affect the standard leptoquark phenomenology. We discuss constraints on these interactions from the helicity-suppressed π → ν + e decay.

KW - Effective interaction

KW - Higgs

KW - Leptoquarks

KW - Non-chiral

KW - Pion decay

UR - http://www.scopus.com/inward/record.url?scp=0002312340&partnerID=8YFLogxK

U2 - 10.1016/0370-2693(96)00419-4

DO - 10.1016/0370-2693(96)00419-4

M3 - Article

AN - SCOPUS:0002312340

VL - 378

SP - 17

EP - 22

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 - 1-4

ER -

New low-energy leptoquark interactions

Abstract

Keywords

ASJC Scopus subject areas

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