Semileptonic decays of 
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 and 
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 mesons in the relativistic quark model

Фаустов, Р. Н.; Galkin, V. O.; Kang, X. S.

doi:10.1103/physrevd.101.013004

Cited by 39 publications

(41 citation statements)

References 46 publications

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“…Table II shows the comparison of our BF to various theoretical calculations of D þ → ωμ þ ν μ decay. Our BF is consistent with the predicted values based on the LFQM, CCQM, and LCSR methods [14,[16][17][18], but differs from those based on the χUA [15] and RQM [19] methods by 2.5σ and 1.5σ, respectively. Combining the B D þ →ωμ þ ν μ measured in this work with the world average B PDG D þ →ωe þ ν e ¼ ð16.9 AE 1.1Þ × 10 −4 [12,32,38], we obtain the BF ratio to be B D þ →ωμ þ ν μ =B PDG D þ →ωe þ ν e ¼ 1.05 AE 0.14.…”

Section: 773supporting

confidence: 88%

“…It agrees with the standard model predictions (0.93-0.99) [14][15][16][17]19] within uncertainties, and implies no violation of e-μ LFU found with current statistics.…”

Section: 773supporting

confidence: 86%

“…Although this decay was theoretically predicted before 1990 [13], it has never been experimentally confirmed yet to date. Since 2015, different theoretical approaches, e.g., light-front quark model (LFQM) [14], recalled chiral unitary approach (χUA) [15], covariant confined quark model (CCQM) [16], light-cone QCD sum rules (LCSR) [17,18], and relativistic quark model (RQM) [19], were adopted to investigate D þ → ωμ þ ν μ . The predicted BFs range between ð1.78-2.46Þ × 10 −3 [14][15][16][17][18][19], corresponding to the BF ratios B D þ →ωμ þ ν μ = B D þ →ωe þ ν e of (0.93-0.99).…”

mentioning

confidence: 99%

“…Comparison of the BFs between D þ → ωe þ ν e and D þ → ωμ þ ν μ .CCQM[14] χUA[15] LFQM[16] LCSR[17] LCSR[18] RQM[19] MeasurementB D þ →ωμ þ ν μ (×10 AE 1.1 [12] B D þ →ωμ þ ν μ =B PDG D þ →ωe þ ν e…”

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confidence: 99%

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Observation of the semimuonic decay D+→ωμ+νμ

Ablikim¹,

Adlarson²,

Biernat³

et al. 2020

Phys. Rev. D

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We report the first observation of the semimuonic decay D þ → ωμ þ ν μ using an e þ e − collision data sample corresponding to an integrated luminosity of 2.93 fb −1 collected with the BESIII detector at a center-of-mass energy of 3.773 GeV. The absolute branching fraction of the D þ → ωμ þ ν μ decay is measured to be B D þ →ωμ þ ν μ ¼ ð17.7 AE 1.8 stat AE 1.1 syst Þ × 10 −4. Its ratio with the world average value of the branching fraction of the D þ → ωe þ ν e decay probes lepton flavor universality and it is determined to be B D þ →ωμ þ ν μ =B PDG D þ →ωe þ ν e ¼ 1.05 AE 0.14, in agreement with the standard model expectation within one standard deviation.

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Section: 773supporting

confidence: 88%

“…It agrees with the standard model predictions (0.93-0.99) [14][15][16][17]19] within uncertainties, and implies no violation of e-μ LFU found with current statistics.…”

Section: 773supporting

confidence: 86%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Observation of the semimuonic decay D+→ωμ+νμ

Ablikim¹,

Adlarson²,

Biernat³

et al. 2020

Phys. Rev. D

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“…Both transition form factors (TFFs) and helicity form factors (HFFs) contain information on meson semileptonic decays independently because they can describe the nonperturbative hadronic matrix elements of meson semileptonic decays independently. One can decompose the hadronic matrix elements by applying the momentum of initial and final meson states to obtain TFFs [46][47][48][49][50][51][52][53], which will lead to a mix of longitudinal and transverse polarizations [57,58] with σ = 0, 1, 2, t.…”

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

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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.

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A comprehensive study on the semileptonic decay of heavy flavor mesons

Zhang

Kang

Guo

et al. 2021

J. High Energ. Phys.

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The semileptonic decay of heavy flavor mesons offers a clean environment for extraction of the Cabibbo-Kobayashi-Maskawa (CKM) matrix elements, which describes the CP-violating and flavor changing process in the Standard Model. The involved form factors where the dynamical information is encoded play an essential role in achieving any conclusive statement. That is, the knowledge of the form factors should be under good control, requiring one to examine more observables in addition to the branching fraction. In this paper, we provide the mean value and the q2-dependent shape for further observables [differential decay distribution (dΓ/dq2), forward-backward asymmetry $$ \left({\mathcal{A}}_{FB}^{ls}\right) $$ A FB ls , longitudinal $$ \left({P}_L^l\right) $$ P L l and transverse $$ \left({P}_T^l\right) $$ P T l polarization of a charged lepton, longitudinal polarization of a vector meson in the final state $$ \left({F}_L^l(V)\right) $$ F L l V , leptonic convexity parameter $$ \left({C}_F^l\right) $$ C F l , and trigonometric moments $$ \left({W}_i^l\right) $$ W i l in the decay of D(s) and B(s) to P/Vl+νl (l = e, μ or τ)], based on the predictions of the relevant form factors from the covariant light-front quark model. P and V denote the pseudoscalar and vector meson, respectively. As a comparison, we find a good agreement with the results from the covariant confining quark model and the relativistic quark model in the literature. As it has been observed that the $$ {P}_L^l $$ P L l and $$ {F}_L^l(V) $$ F L l V are crucial quantities to discriminate various New Physics models, the reexamination of these observables from a different method is also essential and necessary.

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Semileptonic decays of D and Ds mesons in the relativistic quark model

Cited by 39 publications

References 46 publications

Observation of the semimuonic decay D+→ωμ+νμ

Observation of the semimuonic decay D+→ωμ+νμ

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

A comprehensive study on the semileptonic decay of heavy flavor mesons

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