Rare decays B0s,d→l+l in a top quark two-Higgs-doublet model

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ZHANG Guo-Fang, SONG Jin-Fan, LU Gong-Ru and Rare decays B0s,d→l+l in a top quark two-Higgs-doublet model[J]. Chinese Physics C, 2010, 34(2): 165-170. doi: 10.1088/1674-1137/34/2/002
ZHANG Guo-Fang, SONG Jin-Fan, LU Gong-Ru and Rare decays B0s,d→l+l in a top quark two-Higgs-doublet model[J]. Chinese Physics C, 2010, 34(2): 165-170.  doi: 10.1088/1674-1137/34/2/002 shu
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Received: 2009-03-19
Revised: 2009-05-13
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Rare decays B0s,d→l+l in a top quark two-Higgs-doublet model

    Corresponding author: ZHANG Guo-Fang,

Abstract: 

In the framework of T2HDM, we calculated the new physics contributions involving neutral Higgs bosons to the branching ratios of B0s,d→l+l (l=e, μ) decays. Comparing the theoretical predictions with the experimental upper-limits, we found that (a) The data of Br(B0d→l+l) give the upper bound on tanβ: tanβ≤22, while Br(B0s→l+l) give tanβ≤12 for fixed δ=0°, mH+=350 GeV, mH0=160 GeV, mh0=115 GeV and mA0=120 GeV; (b) A light neutral Higgs boson mass mh0 (mA0) less than 50 GeV (120 GeV) is excluded by the data of branching ratios for B0s,d→l+l(l=μ) decays with tanβ=10; (c) The bounds on mh0 and tanβ, or mA0 and tanβ are strongly correlated: a smaller (larger) tanβ means a lighter (heavier) neutral Higgs boson.

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