The exclusive B → πℓ + ℓ − and B → ρℓ + ℓ − decays in the general two Higgs doublet model

A BSTRACT : We study the differential branching ratio, branching ratio and the forward-backward asymmetry for the exclusive B → πℓ + ℓ − and B → ρℓ + ℓ − decays in the general two Higgs doublet model including the neutral Higgs boson effects. We analyze the dependencies of these quantities on the neutral Higgs boson contributions and the other model parameters. We observe that two Higgs doublet model with the neutral Higgs boson exchanges gives quite sizable contributions to these observables for both channels we consider. Since the neutral Higgs boson exchanges are the only source of the forward-backward asymmetry for B → πτ + τ − decay, which is at the order of magnitude 1 − 10% , measurement of this observable is promising to determine the neutral Higgs boson effects.

[1]  G. Erkol,et al.  Radiative dileptonic decays of B-meson in the general two Higgs Doublet Model , 2001, hep-ph/0112115.

[2]  I. Turan,et al.  Bs→τ+τ−γdecay in the general two Higgs doublet model including the neutral Higgs boson effects , 2001, hep-ph/0110017.

[3]  J. Yang,et al.  Rare B-meson dileptonic decays in Minimal Supersymmetric Model , 2001 .

[4]  C. Bobeth,et al.  Analysis of neutral Higgs-boson contributions to the decays B s → l + l − and B ¯ → Kl + l − , 2001, hep-ph/0104284.

[5]  E. Iltan.  B --> K l^+ l^- decay in the general two Higgs doublet model , 2001, hep-ph/0102061.

[6]  T. Aliev,et al.  General analysis of lepton polarizations in rare B -> K*l(+)l(-) decay beyond the standard model , 2000, hep-ph/0009133.

[7]  M. Savci,et al.  Exclusive B ->pi l(+)l(-) and B -> pl(+)l(-) decays in the two Higgs doublet model , 1999 .

[8]  W. Keung,et al.  Phase effect of a general two-Higgs-doublet model in b{r_arrow}s{gamma} , 1998, hep-ph/9811235.

[9]  E. Iltan.  THE EXCLUSIVE $\bar B \to\pi e^+ e^-$ AND $\bar B\to \rho e^+ e^-$ DECAYS IN THE TWO HIGGS DOUBLET MODEL WITH FLAVOR CHANGING NEUTRAL CURRENTS , 1998, hep-ph/9807256.

[10]  V. Braun,et al.  Exclusive semileptonic and rare B meson decays in QCD , 1998, hep-ph/9805422.

[11]  T. Aliev,et al.  B_{s}??? decay in the two Higgs doublet model with flavor changing neutral currents , 1998, hep-ph/9804458.

[12]  T. Aliev,et al.  B(s) ---> gamma gamma decay in the two Higgs doublet model with flavor changing neutral currents , 1998, hep-ph/9803459.

[13]  T. Aliev,et al.  b rightarrow sgamma decay in the two Higgs doublet model with flavour changing neutral currents , 1998, hep-ph/9803272.

[14]  M. Ciuchini,et al.  Next-to-Leading QCD Corrections to B → Xsγ: Standard Model and Two-Higgs Doublet Model , 1997, hep-ph/9710335.

[15]  F. Kruger,et al.  CP violation in the exclusive decays B ---> pi e+ e- and B ---> rho e+ e- , 1997, hep-ph/9706247.

[16]  Chao-shang Huang,et al.  B → Xsτ+τ− in a two-Higgs doublet model☆ , 1997 .

[17]  T. Aliev,et al.  Rare B -> K^* l^+ l^- Decay in Light Cone QCD , 1996, hep-ph/9612480.

[18]  D. Melikhov,et al.  Form factors for rare decays $B\to(\pi,\rho,K,K^*)l^+l^-$ in quark model , 1996, hep-ph/9609503.

[19]  L. Reina,et al.  Phenomenology of two Higgs doublet models with flavor changing neutral currents , 1996, hep-ph/9609279.

[20]  A. Ali.  $B$ Decays, Flavour Mixings and CP Violation in the Standard Model , 1996, hep-ph/9606324.

[21]  Aliev,et al.  CP asymmetry in b-->sl+l- decay. , 1995, Physical review. D, Particles and fields.

[22]  Melikhov.  Form factors of meson decays in the relativistic constituent quark model. , 1995, Physical review. D, Particles and fields.

[23]  A. Buras,et al.  Effective Hamiltonian for {ital B}{r_arrow}{ital X}{sub {ital s}}{ital e}{sup +}{ital e}{sup {minus}} beyond leading logarithms in the naive dimensional regularization and `t Hooft--Veltman schemes , 1995, hep-ph/9501281.

[24]  Grant,et al.  Implications of a heavy top quark for the two Higgs doublet model. , 1994, Physical review. D, Particles and fields.

[25]  G. Cella,et al.  QCD corrections to electroweak processes in an unconventional scheme: application to the b → sγ decay , 1994, hep-ph/9406203.

[26]  G. Cella,et al.  The b→sγ decay revisited , 1994, hep-ph/9401254.

[27]  M. Misiak.  The b → se+e− and b → sγ decays with next-to-leading logarithmic QCD-corrections , 1993 .

[28]  Weinberg,et al.  Flavor-changing scalar interactions. , 1993, Physical review. D, Particles and fields.

[29]  Hall,et al.  Flavor-changing interactions mediated by scalars at the weak scale. , 1992, Physical review letters.

[30]  Yuan,et al.  Rare B decays, rare tau decays, and grand unification. , 1991, Physical review. D, Particles and fields.

[31]  M. Savage.  Constraining flavour changing neutral currents with B→μ+μ− , 1991 .

[32]  G. Ridolfi,et al.  Effects of supergravity-induced electroweak breaking on rare b-decays and mixings , 1991 .

[33]  J. Kalinowski.  Semileptonic decays of B mesons into t?t in a two Higgs doublet model? , 1990 .

[34]  B. Grinstein,et al.  Strong-interaction effects in weak radiative decay , 1989 .

[35]  H. Navelet,et al.  QCD radiative corrections to charmless B decays , 1989 .

[36]  H. Navelet,et al.  QCD-corrected effective lagrangian for b→s processes , 1988 .

[37]  Cheng,et al.  Mass-matrix ansatz and flavor nonconservation in models with multiple Higgs doublets. , 1987, Physical review. D, Particles and fields.

[38]  Steven Weinberg,et al.  Natural conservation laws for neutral currents , 1977 .