FCNC in leptonic and semileptonic decays of D mesons in a general two-Higgs doublet model

Details FCNC in leptonic and semileptonic decays of D mesons in a general two-Higgs doublet model FCNC in leptonic and semileptonic decays of D mesons in a general two-Higgs doublet model

1998-04-23

arxiv.org/abs/hep-ph/9804368v1

Phys.Rev. D58 (1998) 033003

Physics

High Energy Physics

High Energy Physics - Phenomenology

latex, 10 pages, to appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.58.033003

Large long-distance standard model effects in FCNC semileptonic D decays can make observable these processes in future measurements. Eventual disagreements in this sector and/or the observation of lepton family violating (LFV) D decays would require an explanatio beyond the SM framework. In this paper we confront present experimental data on leptonic and semileptonic FCNC and LFV D meson decays with a version of the two-Higgs doublet model that allows these effects to occur at tree- level. The stringent bounds on the parameters of the model are obtained from D^0 --> l^+l'^- and D --> pi l^+l'^- decays. The consistency of the model requires that the branching fractions of D --> V l^+l'^- decays should be below the 10^{-9} level.

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