4,137 research outputs found
Limit on in Two Higgs Doublet Models
Using the recent CLEO measurement of , we find that the
branching ratio of cannot be larger than in two Higgs doublet
models. The small experimental value of can no longer be
explained by charged Higgs boson effects.Comment: 11 pages + 3 Figures (not included), ReVTeX, NTUTH-94-16 and
NHCU-HEP-94-1
Holographic Schwinger effect with a moving D3-brane
We study the Schwinger effect with a moving D3-brane in a =4 SYM
plasma with the aid of AdS/CFT correspondence. We discuss the test particle
pair moving transverse and parallel to the plasma wind respectively. It is
found that for both cases the presence of velocity tends to increase the
Schwinger effect. In addition, the velocity has a stronger influence on the
Schwinger effect when the pair moves transverse to the plasma wind rather than
parallel.Comment: 8 pages, 6 figure
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