On mass limits for leptoquarks from $ K_L^0 \to e^{\mp} μ^{\pm}, B^0 \to e^{\mp} τ^{\pm} $ decays

Details On mass limits for leptoquarks from $ K_L^0 \to e^{\mp} μ^{\pm}, B^0 \to e^{\mp} τ^{\pm} $ decays On mass limits for leptoquarks from $ K_L^0 \to e^{\mp} μ^{\pm}, B^0 \to e^{\mp} τ^{\pm} $ decays

2006-12-28

arxiv.org/abs/hep-ph/0612356v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 3 figures, submitted to Proceedings of the 14th International Seminar "Quarks'2006", Repino, St.Petersburg, Russia, M

Scientific paper

The contributions of the scalar leptoquark doublets into widths of the $K^0_L \to e^{\mp} \mu^{\pm}$, $B^0 \to e^{\mp} \tau^{\pm}$ decays are calculated in MQLS model with Higgs mechanism of the quark-lepton mass splitting. The resulted mass limits for the scalar leptoquarks are investigated in comparision with those for vector and chiral gauge leptoquarks. It is shown that the scalar leptoquark mass limits are essentially weaker (about $200 GeV$) than those (a few hundreds $TeV$) for gauge leptoquarks. The search for such scalar leptoquark doublets at LHC and the search for the leptonic decays $ B^0 \to l^+_i l^-_j $ are of interest.

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