Strong decays of<i>QQ¯</i>mesons

Gobbi, Carlo; Iachello, F.; Kusnezov, Dimitri

doi:10.1103/physrevd.50.2048

Cited by 14 publications

(23 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a result we find g = 1.164 GeV −1 and h = −0.094 GeV −1 . The relative sign is consistent with a previous analysis of the strong decay of mesons [20] and with a derivation from the axial-vector coupling (see e.g. [15]).…”

Section: Resultssupporting

confidence: 79%

Strong decays of nonstrangeq3baryons

1997

View full text Add to dashboard Cite

show abstract

Section: Resultssupporting

confidence: 79%

Strong decays of nonstrangeq3baryons

1997

View full text Add to dashboard Cite

show abstract

“…The experimental value from [26], which is 10.7 ± 2.3, would imply a dominant ωππ mode and in turn rather small two-pseudoscalar partial decay widths. This finding is in disagreement with the results of [5,27]. In [5] a value of (Γ a 0 ) 2P = 390 ± 110 MeV is found, in the work of [27] one has (Γ a 0 ) 2P = 420-940 MeV for a 0 masses in the range of 1200-1400 MeV.…”

Section: Quantitycontrasting

confidence: 67%

Scalar meson and glueball decays within a effective chiral approach

et al. 2005

View full text Add to dashboard Cite

We study the strong and electromagnetic decay properties of scalar mesons above 1 GeV within a chiral approach. The scalar-isoscalar states are treated as mixed states of quarkonia and glueball configurations. A fit to the experimental decay rates listed by the Particle Data group is performed to extract phenomenological constraints on the nature of the scalar resonances. A comparison to other theoretical approaches in the scalar meson sector is discussed.

show abstract

“…The parameters C and β in F K * (892)Kπ are C = 2.72 fm and β = 8.88 × 10 −3 fm 2 used in ref. [24].We first discuss the π + p → Σ + K + channel displayed in fig 3 (a). The experimental data are given with error bars [17].…”

mentioning

confidence: 99%

“…The parameters C and β in F K * (892)Kπ are C = 2.72 fm and β = 8.88 × 10 −3 fm 2 used in ref. [24].…”

mentioning

confidence: 99%

See 1 more Smart Citation

The role of the Δ (1920) resonance for kaon production in heavy ion collisions

1994

View full text Add to dashboard Cite

The long mean free path of K + mesons in nuclear matter makes this particle a suitable messenger for the dynamics of nucleus-nucleus reactions at intermediate energies (100 MeV to 3 GeV per nucleon). A prerequisite for this is the knowledge of the elementary production cross sections πN → ΣK. Here these cross sections are studied for the first time with the explicite inclusion of the rel (1 − ) vector meson exchange is included. It is shown that the total cross sections for different channels of the πN → ΣK reactions, i.e. π + p → Σ + K + , π − p → Σ − K + , π + n → Σ 0 K + (π − p → Σ − K + ) and π 0 p → Σ 0 K + differ not only by absolute values but also by their energy dependence. This shape differences are due to the mixture of the isospin I = 3/2 ∆(1920) with isospin I = 1/2 nucleon resonances. However, this I = 3/2 resonance does not give a contribution to the πN → ΛK reactions. So the shapes of the total cross sections πN → ΛK for different isospin projections are the same. In spite of this, such cross sections averaged over different isospin projections in the same multiplet are often used for studies of kaon production in heavy-ion collisions. Here we give an explicit separate parametrization of the cross sections for each channel πN → ΣK, which are calculated in this work. The total cross section for π − p → Σ − K + which runs through different I = 3/2 and I = 1/2 resonances can be well reproduced by the present model. * Supported by DFG under contract No. Fa 67/14-1 † Supported by GSI under contract No. 06 TÜ 736 0 Because kaons (K + ) have a long mean free path inside the nucleus, one believes that they are good messengers to provide information about the high density and temperature phase of the heavy ion collisions [1,2]. Furthermore, they can be also sensitive probes for the nuclear equation of state (EOS) [3]. For these reasons, many studies of kaon production in heavy ion collisions have been performed both theoretically and experimentally [1]- [13].In most theoretical studies of the kaon production in heavy ion collisions by either the Vlasov-Uehling-Uhlenbeck approach (VUU) [4], or by "quantum" molecular dynamics (QMD) [5,6], however, the kaon elementary production cross sections in free space parametrized by J. Randrup and C. M. Ko [12] for B 1 B 2 → B 3 Y K, and by J. Cugnon and R. M. Lombard [13] for πN → Y K are widely used. Here B stands for either the nucleon or the ∆(1232), Y stands for either the Σ or the Λ, respectively. Although there exists a relatively long history for kaon production studies, not many investigations have been performed for the elementary process [14].On the other hand, due to recent high precision data, we have now rich and accurate informations on the baryon resonances, on quantum numbers, on decay modes, on decay rates and so on [15,16]. Thus, it is now adequate and necessary to incorporate these resonances in calculations of the elementary cross section for kaon production. There are some works which include such baryon resonances in kaon production stu...

show abstract

Strong decays ofQQ¯mesons

Cited by 14 publications

References 13 publications

Strong decays of nonstrangeq3baryons

Strong decays of nonstrangeq3baryons

Scalar meson and glueball decays within a effective chiral approach

The role of the Δ (1920) resonance for kaon production in heavy ion collisions

Contact Info

Product

Resources

About