Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-11-03
Phys.Rev. D60 (1999) 073002
Physics
High Energy Physics
High Energy Physics - Phenomenology
11 pages, 3 eps figures, uses revtex
Scientific paper
10.1103/PhysRevD.60.073002
Allowing leptoquarks to interact with both right-handed and left-handed neutrinos (i.e., ``non-chiral'' leptoquarks), we show that a non-zero neutrino magnetic moment can arise naturally. Although the mass of the non-chiral vector leptoquark that couples to the first generation fermions is constrained severely by universality of the $\pi^+$ leptonic decays and is found to be greater than 50 TeV, the masses of the second and third generation non-chiral vector leptoquarks may evade such constraint and may in general be in the range of $1\sim 100$ TeV. With reasonable input mass and coupling values, we find that the neutrino magnetic moment due to the second generation leptoquarks is of the order of $10^{-12}\sim 10^{-16} \mu_{\rm B}$ while that caused by the third generation leptoquarks, being enhanced significantly by the large top quark mass, is in the range of $10^{-10}\sim 10^{-14} \mu_{\rm B}$.
Chua Chun-Khiang
Hwang Wei-Yan Pauchy
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