### Abstract

We present a calculation of the B^{0}B^{0} 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 η_{2} which modifies the result obtained at the lowest order of perturbation theory. In the Standard Model case, we confirm the results for η_{2} obtained by Buras, Jamin and Weisz [Nucl. Phys, B 347 (1990) 491]. The factor η_{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}.

Original language | English |
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Pages (from-to) | 40-58 |

Number of pages | 19 |

Journal | Nuclear Physics B |

Volume | 523 |

Issue number | 1-2 |

DOIs | |

Publication status | Published - Jul 13 1998 |

### Keywords

- 2HDM
- CKM matrix
- CP violation
- Mixing
- Oscillations

### ASJC Scopus subject areas

- Nuclear and High Energy Physics

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## Cite this

^{0}B

^{0}mixing with an extended Higgs sector.

*Nuclear Physics B*,

*523*(1-2), 40-58. https://doi.org/10.1016/S0550-3213(98)00043-1