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Particles and Fields


Eur. Phys. J. C 25, 103-111 (2002)
DOI: 10.1007/s10052-002-0972-4

Rare decay $B\rightarrow X_sl^+l^-$ in a CP spontaneously broken two-Higgs doublet model

C.-S. Huang1, W. Liao2, Q.-S. Yan3 and S.-H. Zhu4

1  Institute of Theoretical Physics, Academia Sinica, P.O. Box 2735, Beijing 100080, P.R. China
2  The Abdus Salam International Centre for Theoretical Physics, P.O. Box 586, 34014 Trieste, Italy
3  Institute of High Energy Physics, Chinese Academy of Sciences, P.O. Box 918-4, Beijing 100039, P.R. China
4  Institut für Theoretische Physik, Universität Karlsruhe, 76128 Karlsruhe, Germany

(Received: 15 October 2001 / Revised version: 5 March 2002 / Published online: 26 July 2002 )

Abstract
The Higgs boson mass spectrum and couplings of the neutral Higgs bosons to the fermions are worked out in a CP spontaneously broken two-Higgs doublet model in the large $\tan\beta$ case. The differential branching ratio, forward-backward asymmetry, CP asymmetry and lepton polarization for $B\rightarrow X_sl^+l^-$ are computed. It is shown that the effects of neutral Higgs bosons are quite significant when $\tan\beta$ is large. Especially, the CP violating normal polarization PN can be as large as several percents.



© Società Italiana di Fisica, Springer-Verlag 2002