Decay constants and semileptonic decays of heavy mesons in the relativistic quark model

Hwang, Dae Sung; Kim, C. S.; Namgung, W.

doi:10.1103/physrevd.53.4951

Cited by 26 publications

(24 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For the mass predictions, the nonrelativistic potential models [2,3,4,5,6,7,8] and the relativistic approaches [10,11]etc.,were successful at the heavy flavour sectors while the Bethe-Salpeter approach under harmonic confinement [9] was successful at low flavour sector. Some potential models have also predicted the masses and various decays of the heavy-heavy mesons which are in fair agreement with the experimental results [12,13,14,15,16,17,18,19,20,22]. A comprehensive review of developments in heavy quarkonium physics is available in ref [23].…”

Section: Introductionsupporting

confidence: 57%

Deacy of quark-antiquark mesons in NRQCD formalism

Kumar

Vinodkumar

Credé³

et al. 2010

AIP Conference Proceedings

View full text Add to dashboard Cite

Abstract.We investigate the decay properties of the quark-antiquark (cc)system using NRQCD formalism. The basic parameters for the decay of the cc states are obtained from phenomenological potential scheme of the type V (r) = − α c r +Ar ν , with ν varying from 0.5 to 2, which is employed to fit the low lying spectra. The resultant wave function and mass parameters are employed to determine the decay constants f P/V with and without QCD corrections. By incorporating the relativistic corrections of order v 4 to the heavy quarkonium decays into two photons, and the vector state into lepton pairs are computed within the NRQCD formalism. These decay widths are also investigated by incorporating radiative corrections up to the lowest order to the conventional Van Royen-Weisskopf formula. Our theoretical predictions of the decays of the cc meson for the potential index around 0.7 are comparable with other model predictions and with the experimental values.

show abstract

Section: Introductionsupporting

confidence: 57%

Deacy of quark-antiquark mesons in NRQCD formalism

Kumar

Vinodkumar

Credé³

et al. 2010

AIP Conference Proceedings

View full text Add to dashboard Cite

show abstract

“…and the second order gives p 2 = 0.562 GeV 2 , which should be compared with the latest values p F = 0.5 −0.6 GeV calculated in [19] which correspond to p 2 = 0.375 −0.540 GeV 2 .…”

Section: Numerical Analysismentioning

confidence: 52%

“…, and |V ub /V cb |, in which use has been made the Gaussian form for the heavy meson wave function and has been adopted the so-called Cornell potential, the same as ours. [19] They have derived the relation of these physical quantities in terms of the Fermi momentum, p F , introduced in [20] in which p F is related to a heavy quark recoil momentum, p , by…”

Section: Numerical Analysismentioning

confidence: 99%

See 1 more Smart Citation

Spectroscopy of Heavy Mesons Expanded in 1/mQ

Matsuki¹,

Morii²

1997

Aust. J. Phys.

View full text Add to dashboard Cite

Operating just once with the naive Foldy–Wouthuysen–Tani transformation on the Schrödinger equation for Qq bound states, described by the Hamiltonian which includes Coulomb-like as well as confining scalar potentials, we have calculated the heavy meson spectrum of D, D*, B and B*. Based on a formulation recently proposed, their masses and wave functions are expanded in 1=mQ, with a heavy quark mass mQ, up to the second order. The lowest order equation is examined carefully to obtain a complete set of eigenfunctions for the Schrödinger equation.

show abstract

“…[11] within a non relativistic version, to continue with different versions of the relativistic quark model applied to the determination of decay constants [12,13,14,15,16,17,18,19,20,21], form factors and differential decay widths [19,21,22,23,24,25,26,27], Isgur-Wise functions [21,28,29,30,31,32,33,34] or strong coupling constants [19,32,35,36,37,38] 1 .…”

Section: +0001mentioning

confidence: 99%

Study of the leptonic decays of pseudoscalarB,Dand vectorB,Dmesons and of the semileptonic
Albertus
¹
,
Hernández
²
,
Nieves
³

et al. 2005
Phys. Rev. D

View full text Add to dashboard Cite

We present results for different observables in weak decays of pseudoscalar and vector mesons with a heavy c or b quark. The calculations are done in a nonrelativistic constituent quark model improved at some instances by heavy quark effective theory constraints. We determine pseudoscalar and vector meson decay constants that within a few per cent satisfy fV MV /fP MP = 1, a result expected in heavy quark symmetry when the heavy quark masses tend to infinity. We also analyze the semileptonic B → D and B → D * decays for which we evaluate the different form factors. Here we impose heavy quark effective theory constraints among form factors that are not satisfied by a direct quark model calculation. The value of the form factors at zero recoil allows us to determine, by comparison with experimental data, the value of the |V cb | Cabbibo-KobayashiMaskawa matrix element. From the B → D semileptonic decay we get |V cb | = 0.040 ± 0.006 in perfect agreement with our previous determination based on the study of the semileptonic Λ b → Λc decay and also in excellent agreement with a recent experimental determination by the DELPHI Collaboration. We further make use of the partial conservation of axial current hypothesis to determine the strong coupling constants gB * Bπ(0) = 60.5 ± 1.1 and gD * Dπ(0) = 22.1 ± 0.4. The ratio R = ( gB * Bπ(0) fB * √ MD )/( gD * Dπ(0) fD * √ MB ) = 1.105 ± 0.005 agrees with the heavy quark symmetry prediction of 1.

show abstract

Decay constants and semileptonic decays of heavy mesons in the relativistic quark model

Cited by 26 publications

References 30 publications

Deacy of quark-antiquark mesons in NRQCD formalism

Deacy of quark-antiquark mesons in NRQCD formalism

Spectroscopy of Heavy Mesons Expanded in 1/mQ

Study of the leptonic decays of pseudoscalarB,Dand vectorB,Dmesons and of the semileptonic
Albertus
¹
,
Hernández
²
,
Nieves
³

et al. 2005
Phys. Rev. D

Contact Info

Product

Resources

About

Decay constants and semileptonic decays of heavy mesons in the relativistic quark model

Cited by 26 publications

References 30 publications

Deacy of quark-antiquark mesons in NRQCD formalism

Deacy of quark-antiquark mesons in NRQCD formalism

Spectroscopy of Heavy Mesons Expanded in 1/mQ

Study of the leptonic decays of pseudoscalarB,Dand vectorB*,D*mesons and of the semileptonicAlbertus1, Hernández2, Nieves3 et al. 2005Phys. Rev. D

Contact Info

Product

Resources

About

Study of the leptonic decays of pseudoscalarB,Dand vectorB,Dmesons and of the semileptonic
Albertus
¹
,
Hernández
²
,
Nieves
³

et al. 2005
Phys. Rev. D