Fermion and Sfermion Effects in $e^{+}{e}^{-}$ charged Higgs pair production

Abstract

Top and bottom one loop corrections to $e^{+}{e}^{-}\to H^{+}{H}^{-}$ are considered at NLC energies and found to be significantly large and negative over the full range of $tan\beta$. Moreover, loop effects of moderately heavy squarks and sleptons in the minimal supersymmetric extension of the standard model, tend to cancel partly or fully these large corrections, thus providing a useful indirect information about the supersymmetric sector. The overall effect can still range between $-25\%$ and $+25\%$, however lies typically around $-10\%$ in a wide range of the model parameters.

latex, 16 pages and 9 figures (appended as a postscript file) SLAC--PUB--6529, PM/94-17

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