Formfactors of semileptonic decaysB?D(D *)ev from QCD sum rules

Ovchinnikov, A.A.; Slobodenyuk, V. A.

doi:10.1007/bf01415557

Cited by 45 publications

(37 citation statements)

References 7 publications

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“…The analogous sum rules for the three most important B → D * form factors V, A 1 , A 2 are simply reproduced from the sum rules for the heavy-light B → K * form factors obtained in [25], making a replacement m s → m c and switching to the same notations as in (14), (15):…”

Section: Correlation Function and Sum Rulesmentioning

confidence: 99%

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B→D (*) form factors from QCD light-cone sum rules

et al. 2009

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We derive new QCD sum rules for B → D and B → D * form factors. The underlying correlation functions are expanded near the light-cone in terms of B-meson distribution amplitudes defined in HQET, whereas the c-quark mass is kept finite. The leading-order contributions of two-and three-particle distribution amplitudes are taken into account. From the resulting light-cone sum rules we calculate all B → D ( * ) form factors in the region of small momentum transfer (maximal recoil). In the infinite heavy-quark mass limit the sum rules reduce to a single expression for the Isgur-Wise function. We compare our predictions with the form factors extracted from experimental B → D ( * ) lν l decay rates fitted to dispersive parameterizations.

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Section: Correlation Function and Sum Rulesmentioning

confidence: 99%

“…Previously, B → D ( * ) form factors were calculated from QCD sum rules for threepoint correlation functions with finite b-and c-quark masses [15,16]. These calculations employ the local operator-product expansion (OPE) and include nonperturbative effects in the form of quark and gluon condensates.…”

Section: Introductionmentioning

confidence: 99%

B→D (*) form factors from QCD light-cone sum rules

et al. 2009

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“…Note that, this problem has been studied for B q → D * q lν (q = s, d, u) in constituent quark meson (CQM) model in [13] and for q = d, u(B 0 , B ± ) cases in experiment [14]. The application of subleading Isgur-Wise form factor for B → D * lν at heavy quark effective theory (HQET) is calculated in [15] (see also [16,17]). Present work takes into account the SU(3) symmetry breaking and could be considered as an extension of the form factors of D → K * eν presented in [18].…”

Section: Introductionmentioning

confidence: 99%

SemileptonicBq→Dqlν(q=s,d,
Azizi
¹
,
Bayar
²

2008
Phys. Rev. D*
35
5
37
0
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The form factors relevant to B q → D * q (J P = 1 − )ℓν (q = s, d, u) decays are calculated in the framework of the three point QCD sum rules approach. The heavy quark effective theory prediction of the form factors as well as 1/m b corrections to those form factors are obtained. A comparison of the results for the ratio of form factors at zero recoil limit and other values of q 2 with the predictions of the subleading Isgur-Wise form factor application for B → D * ℓν is presented. The total decay width and branching ratio for these decays are also evaluated using the q 2 dependencies of these form factors. The results are in good agreement with the constituent quark meson model and existing experimental data. The q = s case can also be detected at LHC in the near future.

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“…DðD Ã Þe channels. Our calculations will closely follow [3,6,7,25] at zero temperature and [14] at SU(3) symmetry-breaking case. First of all, let us calculate the transition form factors responsible for the B !…”

Section: Theoretical Frameworkmentioning

confidence: 90%

“…DðD Ã Þe# e transition and calculating the corresponding form factors in a vacuum at T ¼ 0 temperature (as an example see [1][2][3][4][5][6][7] and references therein). These channels are results of the most dominant transition of the b quark, b !…”

Section: Introductionmentioning

confidence: 99%

BtoD(D*)eνetransitions at finite temperature in QCD

Azizi

2010

Phys. Rev. D

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In this article, we work out the properties of the B, D, and D Ã mesons as well as the B ! DðD Ã Þe# e decay properties at finite temperature QCD. The behavior of the masses, decay constants and widths of the B, D, and D Ã mesons in terms of the temperature is studied. The temperature dependency of the form factors responsible for such decays are also obtained. These temperature-dependent form factors are used to investigate the variation of the branching ratios with respect to the temperature. It is shown that the branching ratios do not change up to T=T c ¼ 0:3, however they start to diminish with increasing the temperature after this region and vanish at the critical or deconfinement temperature.

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Formfactors of semileptonic decaysB?D(D *)ev from QCD sum rules

Cited by 45 publications

References 7 publications

B→D (*) form factors from QCD light-cone sum rules

B→D (*) form factors from QCD light-cone sum rules

SemileptonicBq→Dqlν(q=s,d,
Azizi
¹
,
Bayar
²

2008
Phys. Rev. D*
35
5
37
0
View full text Add to dashboard Cite

BtoD(D*)eνetransitions at finite temperature in QCD

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Formfactors of semileptonic decaysB?D(D *)ev from QCD sum rules

Cited by 45 publications

References 7 publications

B→D (*) form factors from QCD light-cone sum rules

B→D (*) form factors from QCD light-cone sum rules

SemileptonicBq→Dq*lν(q=s,d,Azizi1, Bayar2 2008Phys. Rev. D355370View full textAdd to dashboardCite

BtoD(D*)eνetransitions at finite temperature in QCD

Contact Info

Product

Resources

About

SemileptonicBq→Dqlν(q=s,d,
Azizi
¹
,
Bayar
²

2008
Phys. Rev. D*
35
5
37
0
View full text Add to dashboard Cite