Near-threshold φ meson production in proton–nucleus reactions and φ width in finite nuclei

Paryev, É. Ya.

doi:10.1088/0954-3899/36/1/015103

Cited by 29 publications

(33 citation statements)

References 30 publications

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“…Model 2: Paryev [27] developed the spectral function approach for φ production in both the primary proton-nucleon and secondary pion-nucleon channels.…”

Section: Modelmentioning

confidence: 99%

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Momentum dependence of theφ-meson nuclear transparency

Hartmann¹,

Kiselev²,

Polyanskiy³

et al. 2012

Phys. Rev. C

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The production of φ mesons in proton collisions with C, Cu, Ag, and Au targets has been studied via the φ → K + K − decay at an incident beam energy of 2.83 GeV using the ANKE detector system at COSY. For the first time, the momentum dependence of the nuclear transparency ratio, the in-medium φ width, and the differential cross section for φ-meson production at forward angles have been determined for these targets over the momentum range of 0.6-1.6 GeV/c. There are indications of a significant momentum dependence in the value of the extracted φ width, which corresponds to an effective φN absorption cross section in the range of 14-21 mb.

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“…Model 2: Paryev [27] developed the spectral function approach for φ production in both the primary proton-nucleon and secondary pion-nucleon channels.…”

Section: Modelmentioning

confidence: 99%

“…The comparison of the ratio with model calculations [26][27][28] yielded an in-medium φ width of 33-50 MeV/c 2 in the nuclear rest frame for an average φ momentum of 1.1 GeV/c for normal nuclear density ρ 0 .…”

Section: Introductionmentioning

confidence: 99%

Momentum dependence of theφ-meson nuclear transparency

Hartmann¹,

Kiselev²,

Polyanskiy³

et al. 2012

Phys. Rev. C

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“…Here σ A and σ C are inclusive cross sections for φ production in pA (A = Cu, Ag, Au) and pC collisions. The comparison of the ratios with model calculations [16,17] yields an in-medium φ width of 33-50 MeV/c 2 in the nuclear rest frame at an average φ momentum of 1.1 GeV/c for normal nuclear density ρ 0 = 0.16 fm −3 .…”

Section: Experiments and Resultsmentioning

confidence: 91%

“…Model 2: Paryev [17] developed the spectral function approach for φ production in both the primary proton-nucleon and secondary pion-nucleon channels.…”

Section: Experiments and Resultsmentioning

confidence: 99%

Momentum dependence of hadronic production of the ϕ-meson and its width in nuclear matter

et al. 2012

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Information on the properties of the φ meson in the nuclear environment has been derived from its production in proton collisions with C, Cu, Al, and Au nuclear targets. The experiment was carried out with 2.83 GeV protons at the Cooler Synchrotron COSY, with the φ being detected via its K + K − decay using M. Hartmann et al. the ANKE magnetic spectrometer. The measured dependence of the production cross section on the nuclear mass number has been compared with calculations within three different nuclear models. These suggest a significant broadening of the width of the φ in medium relative to its vacuum value. The ANKE results obtained in the momentum range 0.6 < p φ < 1.6 GeV/c are compared with data from photoproduction experiments at slightly higher momenta.

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“…The ϕ production in nuclei has been intensively studied both experimentally [1][2][3][4], as well as in theoretical analyses [4][5][6][7][8]. The ϕ nuclear transparency ratio, measured in proton-induced and photoproduction experiments, points to a large absorption in nuclei, consistent with widths about one order of magnitude larger than the one from its dominant decay toKK in vacuum.…”

Section: Introductionmentioning

confidence: 99%

In-Medium Properties of the ϕ Meson with ϕ N Resonant Contributions

Cabrera¹,

Blin²,

Vacas³

2017

Proceedings of the 14th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon (MENU2016)

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Nuclear production experiments report missing absorption processes of the in-medium ϕ meson. Contributions arising from theKK cloud have already been widely studied, and therefore we investigate the ϕ-meson's properties in cold nuclear matter with the additional inclusion of resonant ϕ N interactions. Two models are considered which dynamically generate N * -like states close to the ϕ N threshold. We find that these states, together with the non-resonant part of the amplitude, contribute to the ϕ self-energy with the same order of magnitude as theKK effects. At non-vanishing nuclear density, both models lead to an additional in-medium broadening of the ϕ, up to around 50 MeV. Furthermore, at least one of the models is compatible with a mass shift to lower energies of up to 35 MeV at threshold and normal matter density. Finally, a double-peak structure appears in the spectral function due to the mixing of resonance-hole modes with the ϕ quasi-particle peak. These results converge into the direction of the experimental findings.

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Near-threshold φ meson production in proton–nucleus reactions and φ width in finite nuclei

Cited by 29 publications

References 30 publications

Momentum dependence of theφ-meson nuclear transparency

Momentum dependence of theφ-meson nuclear transparency

Momentum dependence of hadronic production of the ϕ-meson and its width in nuclear matter

In-Medium Properties of the ϕ Meson with ϕ N Resonant Contributions

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