Exclusive semileptonic<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="italic">B</mml:mi></mml:math>decays to radially excited<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="italic">D</mml:mi></mml:math>mesons

Эберт, Д.; Фаустов, Р. Н.; Galkin, V. O.

doi:10.1103/physrevd.62.014032

Cited by 149 publications

(310 citation statements)

References 35 publications

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“…This result is in contradiction to the dominance of specific modes (by more than a factor of 4) in the heavy-to-heavy semileptonic B → D ( * ) J lν l and B s → D ( * ) sJ lν l decays [3,32], but it is consistent with predictions for the corresponding heavy-to-light semileptonic B decays to orbitally excited light mesons [33]. The above mentioned suppression of some heavy-to-heavy decay channels to orbitally excited heavy mesons was mostly pronounced in the heavy quark limit and then slightly reduced by the heavy quark mass corrections which are found to be large [32]. Thus our result once again indicates that the s quark cannot be treated as a heavy one and should be considered to be light instead, as we always did in our calculations.…”

Section: B Semileptonic B S Decays To Orbitally Excited K ( * )contrasting

confidence: 39%

Charmless weakBsdecays in the relativistic quark model

Фаустов

Galkin

2013

Phys. Rev. D

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The form factors of the weak B s transitions to the ground state and orbitally excited strange mesons are calculated in the framework of the QCD-motivated relativistic quark model based on the quasipotential approach. These form factors are expressed through the overlap integrals of meson wave functions found in their mass spectrum evaluations. The momentum dependence of the form factors is determined in the whole accessible kinematical range without any additional assumptions and extrapolations. Relativistic effects, including the wave function transformation from the rest to a moving reference frame as well as contributions of the intermediate negative-energy states, are consistently taken into account. The calculated form factors are used for the evaluation of the charmless semileptonic decay rates and two-body nonleptonic B s decays in the factorization approximation. The obtained results are confronted with previous predictions and available experimental data.

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Section: B Semileptonic B S Decays To Orbitally Excited K ( * )contrasting

confidence: 39%

Charmless weakBsdecays in the relativistic quark model

Фаустов

Galkin

2013

Phys. Rev. D

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“…The resulting bottomonium mass spectrum with the account of this correction is given in Table II. We found that the small shift of the QCD parameter Λ from our previous [11] value 0.178 to 0.168 GeV (with all other parameters remaining fixed) allows us to get a good fit to the bottomonium mass spectrum with the account of finite charm quark mass corrections. The difference between the theoretical and experimental data is less than 3 MeV.…”

Section: Heavy Quarkonium and B C Meson Mass Spectramentioning

confidence: 87%

“…The expression for the quasipotential of the heavy quarkonia, expanded in v 2 /c 2 without and with retardation corrections to the confining potential, can be found in Refs. [10] and [11], respectively. The structure of the spin-dependent interaction is in agreement with the parameterization of Eichten and Feinberg [12].…”

Section: Relativistic Quark Modelmentioning

confidence: 99%

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Properties of heavy quarkonia andBcmesons in the relativistic quark model

2003

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The mass spectra and electromagnetic decay rates of charmonium, bottomonium and B c mesons are comprehensively investigated in the relativistic quark model. The presence of only heavy quarks allows the expansion in powers of their velocities. All relativistic corrections of order v 2 /c 2 , including retardation effects and one-loop radiative corrections, are systematically taken into account in the computations of the mass spectra. The obtained wave functions are used for the calculation of radiative magnetic dipole (M1) and electric dipole (E1) transitions. It is found that relativistic effects play a substantial role. Their account and the proper choice of the Lorentz structure of the quark-antiquark interaction in a meson is crucial for bringing theoretical predictions in accord with experimental data. A detailed comparison of the calculated decay rates and branching fractions with available experimental data for radiative decays of charmonium and bottomonium is presented. The possibilities to observe the currently missing spin-singlet S and P states as well as D states in bottomonium are discussed. The results for B c masses and decays are compared with other quark model predictions.

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“…the authors in Ref. [53] suggested that Z + 2 (4250) could be the charged partner of the 1 − 1P state SS or as the 0 − 1P state of the (SĀ ±SA)/ √ 2 tetraquark. QCD sum rule analysis for Z + 2 (4250) is performed in the Ref.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

AreY(4260)andZ2+(4250)
Ding
¹

2009
Phys. Rev. D

194

137

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In this work, we have investigated whether Y(4260) and Z + 2 (4250) could be D1D or D0D * molecules in the framework of meson exchange model. The off-diagonal interaction induced by π exchange plays a dominant role. The σ exchange has been taken into account, which leads to diagonal interaction. The contribution of σ exchange is not favorable to the formation of molecular state with I G (J PC ) = 0 − (1 −− ), however, it is beneficial to the binding of molecule with I G (J P ) = 1 − (1 − ). Light vector meson exchange leads to diagonal interaction as well. For Z + 2 (4250), the contribution from ρ and ω exchange almost cancels each other. For the currently allowed values of the effective coupling constants and a reasonable cutoff Λ in the range 1-2 GeV, We find that Y(4260) could be accommodated as a D1D and D0D * molecule, whereas the interpretation of Z + 2 (4250) as a D1D or D0D * molecule is disfavored. The bottom analog of Y(4260) and Z + 2 (4250) may exist, and the most promising channels to discovery them are π + π − Υ and π + χ b1 respectively.

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Exclusive semileptonicBdecays to radially excitedDmesons

Cited by 149 publications

References 35 publications

Charmless weakBsdecays in the relativistic quark model

Charmless weakBsdecays in the relativistic quark model

Properties of heavy quarkonia andBcmesons in the relativistic quark model

AreY(4260)andZ2+(4250)
Ding
¹

2009
Phys. Rev. D

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Exclusive semileptonicBdecays to radially excitedDmesons

Cited by 149 publications

References 35 publications

Charmless weakBsdecays in the relativistic quark model

Charmless weakBsdecays in the relativistic quark model

Properties of heavy quarkonia andBcmesons in the relativistic quark model

AreY(4260)andZ2+(4250)Ding1 2009Phys. Rev. D

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Product

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About

AreY(4260)andZ2+(4250)
Ding
¹

2009
Phys. Rev. D