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arXiv · hep-ph/9710245

Next--to--Leading Order QCD corrections for the $B^0 \bar{B^0}$--mixing with an extended Higgs sector

J. Urban·F. Krauss·U. Jentschura·G. Soff
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Abstract

We present a calculation of the B0-B0--mixing including Next--to--Leading Order (NLO) QCD corrections within the Two Higgs Doublet Model (2HDM). The QCD corrections at NLO are contained in the factor denoted by eta_2 which modifies the result obtained at the lowest order of perturbation theory. In the Standard Model case, we confirm the results for eta_2 obtained by Buras, Jamin and Weisz. The factor eta_2 is gauge and renormalization prescription invariant and it does not depend on the infrared behaviour of the theory, which constitutes an important test of the calculations. The NLO--calculations within the 2HDM enhance the LO--result up to 18%, which affects the correlation between M_H and V_{td}.

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J. Urban, F. Krauss, U. Jentschura, G. Soff. 1998-05-08. Next--to--Leading Order QCD corrections for the $B^0 \bar{B^0}$--mixing with an extended Higgs sector. https://doi.org/10.1016/s0550-3213(98)00043-1

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