Analysis of the meson-meson data in the framework of the dispersion<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>D</mml:mi></mml:math>-matrix method

Anisovich, A. V.; Nikonov, V. A.; Sarantsev, A.; Anisovich, V.V.; Matveev, M.; Vulfs, T. O.; Nikonov, K.; Nyíri, J.

doi:10.1103/physrevd.84.076001

Cited by 19 publications

(13 citation statements)

References 42 publications

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“…For baryons this effects exists even for two-particle final states since the pseudoscalar meson can be re-absorbed by the baryon. To take into account such effects, we substitute the K-matrix approach by the so-called D-matrix approach [53]. Here the amplitude has the form:…”

Section: The Structure Of the Partial Wave Amplitudesmentioning

confidence: 99%

Hyperon I: Partial-wave amplitudes for K-p scattering

et al. 2019

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Early data on K − induced reactions off protons are collected and used in a coupled-channel partial wave analysis (PWA). Data which had been published in the form of Legendre coefficients are included in the PWA. In a primary fit using 3* and 4* resonances only, we observe some significant discrepancies with the data. In a systematic search for new Λ and Σ hyperon resonances, additional candidates are found. The significance of the known and of the additional resonances is evaluated. Seventeen resonances listed with 1* or 2* and one resonance listed with 3* in the Review of Particle Properties cannot be confirmed, five new hyperons are suggested. The partial-wave amplitudes deduced in this analysis are compared to those from other analyses.

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Section: The Structure Of the Partial Wave Amplitudesmentioning

confidence: 99%

Hyperon I: Partial-wave amplitudes for K-p scattering

et al. 2019

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“…The mixing angle of scalar mesons can be derived from their decays exploiting SU(3) relations [8][9][10]. A singlet isoscalar meson may decay into ππ, K K, ηη and ηη with squared coupling constants proportional to 3 : 4 : 1 : 0.…”

Section: Su(3) Relationsmentioning

confidence: 99%

Singlet-octet-glueball mixing of scalar mesons

Klempt,

Sarantsev

2021

Preprint

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The mixing angles between scalar isoscalar resonances and a scalar glueball are determined from their decays into two pseudoscalar mesons. For f 0 (1370) and f 0 (1500), at most a small glueball component is admitted by the data. The decay modes of f 0 (1710), f 0 (1770), f 0 (2020), and f 0 (2100) require significant glueball fractions. Above this mass, the errors in the decay frequencies become too large to extract a glueball component. The summation of all observed glueball fractions up to 2100 MeV yields (78±18)%. The glueball fractions as function of the mass are consistent with a scalar glueball at 1965 MeV and a width of 370 MeV as suggested by a measurement of the yield of scalar isoscalar mesons in radiative J/ψ decays.

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“…The different sets of partial-wave amplitudes were fitted with a modified K-matrix approach [71] that takes into account dispersive corrections and the Adler zero. We fit data in which resonances are produced and data in which they are formed in scattering processes.…”

Section: The Pwamentioning

confidence: 99%

Scalar isoscalar mesons and the scalar glueball from radiative $J/ψ$ decays

Sarantsev,

Denisenko,

Thoma

et al. 2021

Preprint

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A coupled-channel analysis of BESIII data on radiative J/ψ decays into ππ, K K, ηη and ωφ has been performed. The partial-wave amplitude is constrained by a large number of further data. The analysis finds ten isoscalar scalar mesons. Their masses, widths and decay modes are determined. The scalar mesons are interpreted as mainly SU(3)-singlet and mainly octet states. Octet isoscalar scalar states are observed with significant yields only in the 1500-2100 MeV mass region. Singlet scalar mesons are produced over a wide mass range but their yield peaks in the same mass region. The peak is interpreted as scalar glueball. Its mass and width are determined to M = 1865±25 +10 −30 MeV and Γ = 370±50 +30 −20 MeV, its yield in radiative J/ψ decays to (5.8 ± 1.0) 10 −3 .

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Analysis of the meson-meson data in the framework of the dispersionD-matrix method

Cited by 19 publications

References 42 publications

Hyperon I: Partial-wave amplitudes for K-p scattering

Hyperon I: Partial-wave amplitudes for K-p scattering

Singlet-octet-glueball mixing of scalar mesons

Scalar isoscalar mesons and the scalar glueball from radiative $J/ψ$ decays

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