Yukawa coupling quantum corrections to the self couplings of the lightest MSSM Higgs boson
Wolfgang Hollik, Siannah Penaranda
Abstract
A detailed analysis of the top-quark/squark quantum corrections to the lightest CP-even Higgs boson (h0) self-couplings is presented in the MSSM. By considering the leading one-loop Yukawa-coupling contributions of O(mt4), we discuss the decoupling behaviour of these corrections when the top-squarks are heavy compared to the electroweak scale. As shown analytically and numerically, the large corrections can almost completely be absorbed into the h0-boson mass. Our conclusion is that the h0 self-couplings remain similar to the coupling of the SM Higgs boson for a heavy top-squark sector.
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