نتایج جستجو برای: 6 feand b
تعداد نتایج: 1728683 فیلتر نتایج به سال:
We report a search for the flavor-changing neutral current decay B → Xsl +l− using a 29.5 fb−1 data sample accumulated at the Υ(4S) resonance with Belle detector at the KEKB e+e− storage ring. We observe evidence for B → Kμ+μ− and report the preliminary branching fraction of B(B → Kμ+μ−) = (0.99 −0.32 +0.13 −0.15)× 10−6. We also set the following 90% confidence level upper limits on the branchi...
GaN buffer deep level centers are studied coupling measurements and device physics simulations. The impact of Feand C-doped samples on low frequency device transconductance and noise is presented. The Felevel found at 0.7 eV below the GaN conduction band results in low frequency generation-recombination noise and transconductance dispersion. The agreement with the model shows that the buffer ca...
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