Flavor changing neutral current transition of 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi></mml:math>
 to 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>a</mml:mi><mml:mn>1</mml:mn></mml:msub></mml:math>
 with light-cone sum rules

Momeni, S.; Khosravi, R.; Falahati, F.

doi:10.1103/physrevd.95.016009

Cited by 12 publications

(15 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The LCSR is an important method in dealing with the semileptonic decays [36][37][38][39][40][41][42][43][44][45]. Its main strategy is to construct an analytic heavy-to-light correlator function in the whole q 2 region and then make an operator product expansion (OPE) and a hadron expression for it in the spacelike and timelike regions, respectively, finally combining the results achieved in those two ways to get the form factors with the help of Borel transformation.…”

Section: Introductionmentioning

confidence: 99%

Branching fractions and polarizations of D→Vℓνℓ within QCD light-cone sum rule

Cheng

Zeng

et al. 2020

Phys. Rev. Research

View full text Add to dashboard Cite

In this paper, we make a detailed study of the D → V helicity form factors (HFFs) within the framework of the QCD light-cone sum rule (LCSR) up to twist-4 accuracy. After extrapolating the LCSR predictions of HFFs to the whole physical q 2 region, we get the longitudinal, transverse, and total |V cq |-independent decay widths of semileptonic decay D → V + ν. Meanwhile, the branching fractions of these decays are also obtained by using the D 0 (D +)-meson lifetime, which agrees well with the BESIII results within the error bars. As a further step, we also investigate the differential and mean predictions for charged lepton (vector meson) polarization in the final state P L,T (F L,T), the forward-backward asymmetry A FB , and the lepton-side convexity parameters C F. Our predictions are consistent with covariant confining quark model results within errors. Thus, we think the LCSR approach for HFFs is applicable for dealing with the D-meson semileptonic decays.

show abstract

Section: Introductionmentioning

confidence: 99%

Branching fractions and polarizations of D→Vℓνℓ within QCD light-cone sum rule

Cheng

Zeng

et al. 2020

Phys. Rev. Research

View full text Add to dashboard Cite

show abstract

“…3 the two-parton DAs of twist-2 for K 1 (1270) and K 1 (1400) mesons at the scale μ = 1 GeV in the frame work of the AdS/QCD and LCSR, where θ K = −34 • . Now, the transition form factors of the semileptonic FCNC decays B → K 1 (1270, 1400), which have been calculated in the LCSR approach [5], are evaluated using the holographic DAs. The explicit expressions of these transition form factors in terms of the DAs are given in Appendix C. We find that, for s 0 (33 ∼ 36), all considered form factors in the AdS/QCD exhibit good stability within the Borel mass parameter 6 GeV 2 ≤ M 2 ≤ 12 GeV 2 .…”

Section: Numerical Analysismentioning

confidence: 99%

“…Sofar, the heavy-to-light transitions B → K 1 + − , as a FCNC process, have been studied in many theoretical approaches in the frame work of the SM such as the threepoint QCD sum rules (3PSR) [1,2], the LCSR [3][4][5], perturbative QCD (PQCD) approach [6,7] and light-front quark model (LFQM) [8,9]; and some NP models, such as universal extra dimension [10][11][12], models involving supersymmetry [13], the fourth-generation fermions [14], the 2HDM [15], the non-universal Z model [16] and the model-independent new-physics corrections to the Wilson coefficients [17]. Considering the physical observables of these decays, such as the branching ratio value, dilepton invariant mass spectrum, forward-backward asymmetry and double lepton polarization provide us a lot of useful information.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Analysis of the semileptonic $$B\rightarrow K_1 \ell ^+ \ell ^-$$ B → K 1 ℓ + ℓ -

Momeni

Khosravi

2018

Eur. Phys. J. C

Self Cite

View full text Add to dashboard Cite

We consider the axial-vector mesons K 1 (1270) and K 1 (1400) as a mixture of two | 3 P 1 and | 1 P 1 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 K 1 in the AdS/QCD correspondence. The transition form factors of the semileptonic B → K 1 decays are derived in terms of the LFDAs for K 1 mesons. Using these form factors and decay constant values, the differential branching ratios of B → K 1 (1270, 1400) + − , = μ, τ transitions are plotted with respect to the four-momentum transfer squared, q 2 . In addition, the branching ratio values of these decays and the non-leptonic B → K 1 (1270, 1400)γ decays are estimated. A comparison is made between our results for the branching ratios of B → K 1 (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 q 2 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).

show abstract

“…Sofar, the heavy-to-light transitions B → K 1 ℓ + ℓ − , as a FCNC process, have been studied in many theoretical approaches in the frame work of the SM such as the three-point QCD sum rules (3PSR) [1,2], the LCSR [3][4][5], perturbative QCD (PQCD) approach [6,7] and light-front quark model (LFQM) [8,9]; and some NP models, such as universal extra dimension [10][11][12], models involving supersymmetry [13], the fourth-generation fermions [14], the 2HDM [15], the non-universal Z ′ model [16] and the model-independent new-physics corrections to the Wilson coefficients [17]. Considering the physical observables of these decays, such as the branching ratio value, dilepton invariant mass spectrum, forward-backward asymmetry and double lepton polarization provide us a lot of useful information.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the semileptonic $B\to K_1 \ell^+ \ell^-$transitions and non-leptonic $B \to K_1 γ$ decay in the AdS/QCD correspondence

Momeni,

Khosravi

2018

Preprint

Self Cite

View full text Add to dashboard Cite

We consider the axial-vector mesons K1(1270) and K1(1400) as a mixture of two | 3 P1 and | 1 P1 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, q 2 . 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 q 2 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).

show abstract

Flavor changing neutral current transition of B to a1 with light-cone sum rules

Cited by 12 publications

References 27 publications

Branching fractions and polarizations of D→Vℓνℓ within QCD light-cone sum rule

Branching fractions and polarizations of D→Vℓνℓ within QCD light-cone sum rule

Analysis of the semileptonic $$B\rightarrow K_1 \ell ^+ \ell ^-$$ B → K 1 ℓ + ℓ -

Analysis of the semileptonic $B\to K_1 \ell^+ \ell^-$transitions and non-leptonic $B \to K_1 γ$ decay in the AdS/QCD correspondence

Contact Info

Product

Resources

About