Analysis of the semileptonic B→K1ℓ ℓ-transitions and non-leptonic B→K1γ decay in the AdS/QCD correspondence.

Momeni, S.; Khosravi, R.

We consider the axial-vector mesons K1(1270) and K1(1400) as a mixture of two |3P1⟩ and |1P1⟩ states with the mixing angle θ that equal to (-34±13)∘. We calculate the light-front distribution amplitudes (LFDAs) and decay constant formulas for both the axial-vector mesons K1 in the AdS/QCD correspondence. The transition form factors of the semileptonic B→K1 decays are derived in terms of the LFDAs for K1 mesons. Using these form factors and decay constant values, the differential branching ratios of B→K1(1270,1400)ℓ ℓ-, ℓ=μ,τ transitions are plotted with respect to the four-momentum transfer squared, q2. In addition, the branching ratio values of these decays and the non-leptonic B→K1(1270,1400)γ decays are estimated. A comparison is made between our results for the branching ratios of B→K1(1270,1400)γ decays in the AdS/QCD model and predictions obtained from the light-cone sum rules (LCSR) as well as the experimental values. Finally, the forward-backward asymmetries for the aforementioned semileptonic decays are plotted on q2 in both the AdS/QCD correspondence and two Higgs doublet model (2HDM) in order to test the standard model (SM) and search for the new physics (NP).

SEMILEPTONIC kaon decay; MESONS; MOMENTUM transfer; PHYSICS; HIGGS bosons

European Physical Journal C -- Particles & Fields, 2018, Vol 78, Issue 10, p1

1434-6044

Academic Journal

10.1140/epjc/s10052-018-6275-1