## Search

Now showing items 21-30 of 89

#### In-medium properties of b and d mesons

(EDP Sciences, 2014-11-24)

The shifts in the masses and decay constants of B and D mesons in nuclear medium are calculated in the frame work of QCD sum rules. The results obtained are compared with the existing theoretical predictions.

#### Thermal behaviors of light unflavored tensor mesons in the framework of QCD sum rule

(IOP Publishing, 2014)

In this paper, we investigated the sensitivity of the masses and decay constants of f(2)(1270) and a(2)(1320) tensor mesons to the temperature using OCD sum rule approach. In our calculations, we take into account new ...

#### Analyses of gD*sDK and gB*sBK vertices in QCD sum rules

(IOP Publishing, 2012)

The coupling constants g D*sDK and g B*sBK are calculated in the framework of QCD sum rules. We evaluate the correlation functions of these vertices considering both D(B) and K mesons off-shell and obtain the results as g ...

#### Investigation of the D*s2(2573)+D+K0 vertex via QCD sum rules

(IOP Publishing, 2014-12-08)

In this work the D∗s2(2573)+D+K0 vertex is studied and the coupling constant corresponding to the D∗s2(2573)+ D+K0 transition is calculated. The calculation is performed using three point QCD sum rules method and the value ...

#### g DsDK*0 and g BsDK*0 coupling constants in QCD sum rules

(IOP Publishing, 2012)

In the present study, we calculate the strong coupling constants g DsDK* 0(800) and g BsDK* 0(800) within the three-point QCD sum rules approach. We evaluate the correlation function of the considered vertices taking into ...

#### Decay constants of heavy vector mesons at finite temperature

(IOP Publishing, 2012)

This study deals with determination of the decay constants of heavy vector mesons in the framework of the thermal QCD sum rules. We calculate both thermal spectral density and non-perturbative contributions taking into ...

#### Mesons spectral functions at finite temperature

(IOP Publishing, 2012)

We investigate the thermal spectral densities for (pseudo)scalar and vector currents in the framework of the real time formalism when mass of two quarks are different. Such spectral densities are necessary for the ...

#### Thermal QCD sum rules study of vector charmonium and bottomonium states

(Springer, 2011-09-23)

We calculate the masses and leptonic decay constants of the heavy vector quarkonia, J/psi and gamma mesons at finite temperature. In particular, considering the thermal spectral density as well as additional operators ...

#### Strong D*(2)(2460)(0) -> D+pi(-) transition in QCD

(EDP Sciences, 2014-11-24)

This work presents the analysis of the transition D*(2)(2460)(0) > D+pi(-). In the calculation three point QCD sum rules method is applied and the value of the coupling constant for the considered vertex is obtained as ...

#### Semileptonic Bc to P-wave charmonia (Xc0,X c1,hc) transitions within QCD sum rules

(AIP Publishing, 2010-06)

The form factors of the semileptonic Bc→S(AV) ℓν(ℓ=τ,μ,e) transitions, where S and AV denote the scalar Xc0 and axial vector (Xc1,hc) mesons, are calculated within the framework of the three-point QCD sum rules. The results ...