“…We have been working on the problem of computing coupling constants for others processes and have a consistent method for this [6][7][8][9][10][11][12][13][14]. Following the QCDSR formalism described in our previous works [6][7][8][9][10][11][12][13][14], we write the three-point correlation function associated with the D * D s K vertex, which is given by…”
mentioning
confidence: 99%
“…Following the QCDSR formalism described in our previous works [6][7][8][9][10][11][12][13][14], we write the three-point correlation function associated with the D * D s K vertex, which is given by…”
We calculate the coupling constants of D * D s K and D * s DK vertices using the QCD sum rules technique. We compare our results with results obtained in the limit of SU(4) symmetry and we found that the symmetry is broken at the order of 40%.Keywords: Coupling constants; Form Factors; QCD Sum RuleThe knowledge of coupling constants in hadronic vertices is crucial to estimate cross sections when hadronic degrees of freedom are used. The kaon is one of the commovers light mesons that can annihilate the charmonium in a nuclear medium, given as result D and D s mesons. Therefore, the absorption of charmonium by kaons in a nuclear medium can be used to study the J/ψ suppression in heavy-ion collisions, which is one of the signatures of the formation of the quark gluon plasma (QGP) [1]. The processes of absorption of J/Ψ by kaons can be visualized in the Figure 1.To evaluate theoretically the cross section for these processes, one can use the approach based on effective SU(4) Lagrangians [2,4]. The effective Lagrangians that describe the processes represented in Fig
“…We have been working on the problem of computing coupling constants for others processes and have a consistent method for this [6][7][8][9][10][11][12][13][14]. Following the QCDSR formalism described in our previous works [6][7][8][9][10][11][12][13][14], we write the three-point correlation function associated with the D * D s K vertex, which is given by…”
mentioning
confidence: 99%
“…Following the QCDSR formalism described in our previous works [6][7][8][9][10][11][12][13][14], we write the three-point correlation function associated with the D * D s K vertex, which is given by…”
We calculate the coupling constants of D * D s K and D * s DK vertices using the QCD sum rules technique. We compare our results with results obtained in the limit of SU(4) symmetry and we found that the symmetry is broken at the order of 40%.Keywords: Coupling constants; Form Factors; QCD Sum RuleThe knowledge of coupling constants in hadronic vertices is crucial to estimate cross sections when hadronic degrees of freedom are used. The kaon is one of the commovers light mesons that can annihilate the charmonium in a nuclear medium, given as result D and D s mesons. Therefore, the absorption of charmonium by kaons in a nuclear medium can be used to study the J/ψ suppression in heavy-ion collisions, which is one of the signatures of the formation of the quark gluon plasma (QGP) [1]. The processes of absorption of J/Ψ by kaons can be visualized in the Figure 1.To evaluate theoretically the cross section for these processes, one can use the approach based on effective SU(4) Lagrangians [2,4]. The effective Lagrangians that describe the processes represented in Fig
“…As an illustration, we show in Fig. 5 the form factor F ψDD * (p [29]. The ratios of the pole contribution versus the whole dispersion integral are also depicted in Fig.…”
Section: Form Factors For the Off-shell Vertex Couplingsmentioning
confidence: 97%
“…QSSR reanalysis of the form factor FψDD * (p Since the mass of J/ψ is below the lowest threshold of open charm DD, it is not possible to measure the form factor F ψDD * (p 2 5 ) in experiment directly. There has been a systematic investigation of the charmonium to open charmed meson form factors in the framework of QSSR [29,30]. As a crucial criterion of QSSR, the pole contribution should take a dominant part in the dispersion integral.…”
Section: Form Factors For the Off-shell Vertex Couplingsmentioning
confidence: 99%
“…To obtain more concrete information about the form factor, we consider a large virtuality interval 0 ≤ −p 2 5 ≤ 5 GeV 2 , which is the same as in Ref. [29]. As an illustration, we show in Fig.…”
Section: Form Factors For the Off-shell Vertex Couplingsmentioning
The strong-isospin violation in ψ(3770) → J/ψ+π 0 via intermediate D meson loops is investigated in an effective Lagrangian approach. In this process, there is only one D-meson loop contributing to the absorptive part, and the uncertainties due to the introduction of form factors can be minimized. With the help of QCD spectral sum rules (QSSR), we extract the J/ψDD * form factor as an implement from the first principle of QCD. The DD * π 0 form factor can be well determined from the experimental data for D → πlν. The exploration of the dispersion relation suggests the dominance of the dispersive part via the intermediate D meson loops even below the open charm threshold. This investigation could provide further insights into the puzzling question on the mechanisms for ψ(3770) → non-DD transitions.
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