Partial restoration of chiral symmetry in cold nuclear matter: the<i>ϕ</i>-meson case

Cobos-Martínez, J. J.; Tsushima, K.; Krein, G.; Thomas, A. W.

doi:10.1088/1742-6596/912/1/012009

Cited by 4 publications

(4 citation statements)

References 68 publications

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“…with cutoff parameter Λ B [21][22][23][24][56][57][58][59][60], for each ΥBB vertex. In a later section we will discuss the nonneglegible role played by this form factor and the cutoff parameter Λ B .…”

Section: A υ Mass Shiftmentioning

confidence: 99%

$Υ$ and $η_b$ nuclear bound states

~Cobos-Martínez¹,

~Zeminiani²,

~Tsushima³

2022

Preprint

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Υ and η b nuclear bound state energies are calculated for various nuclei neglecting any possible effects of the widths. Essential input for the calculations, namely the medium-modified B and B * meson masses, as well as the density distributions in nuclei, are calculated within the quark-meson coupling (QMC) model. The attractive potentials for the Υ and η b mesons in nuclei are calculated from the mass shifts of these mesons in nuclear matter in the local density approximation. These potentials originate from the in-medium enhanced BB and BB * loops in their respective self energy. After an extensive analysis we conclude that our results suggest that the Υ and η b mesons should form bound states with all the nuclei considered.

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Section: A υ Mass Shiftmentioning

confidence: 99%

$Υ$ and $η_b$ nuclear bound states

~Cobos-Martínez¹,

~Zeminiani²,

~Tsushima³

2022

Preprint

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“…We use the effective interaction Lagrangians in Eqs. ( 1)-(2) to compute the η c and J/Ψ self energies in vacuum and symmetric nuclear matter, following our previous works [17,18,19,20,45,46,47,48,49]. In this section we focus on the η c meson.…”

Section: Introductionmentioning

confidence: 99%

“…It is worth stressing that compared to the situation for the lighter φ meson [40,41,42,43,44,45,46,47,48,49], which couples strongly to abovethreshold K K states, the charmonium states are expected to have a small width in medium. Moreover, since charmonia are heavier than the φ meson, they are expected to move slower than the φ meson once produced near threshold inside a nucleus.…”

Section: Introductionmentioning

confidence: 99%

$η_{c}$-nucleus bound states

Cobos-Martínez,

Tsushima,

Krein

et al. 2020

Preprint

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η c -and J/Ψ-nucleus bound state energies are calculated for various nuclei. Essential input for the calculations, namely the medium-modified D and D * meson masses, as well as the density distributions in nuclei, are calculated within the quark-meson coupling (QMC) model. The attractive potentials for the η c and J/Ψ mesons in the nuclear medium originate, respectively, from the in-medium enhanced DD * and D D loops in the η c and J/Ψ self energies. Our results suggest that the η c and J/Ψ mesons should form bound states with all the nuclei considered when they are produced at rest inside the nucleus.

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“…[1][2][3][4][5]). Among these, there is a special interest in the φ meson [6]. In particular, the φ meson (in contrast to the ρ and ω mesons) is a very narrow resonance in vacuum and does not overlap with other light resonances in the mass spectrum.…”

Section: Introductionmentioning

confidence: 99%

Momentum dependence of pion-induced ϕ meson production on nuclei near threshold

Paryev¹

2018

Chinese Phys. C

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We study the near-threshold pion-induced production of φ mesons off nuclei in the kinematical conditions of the HADES experiment, recently performed at GSI. The calculations have been performed within a collision model based on the nuclear spectral function. The model accounts for both the primary π − meson-proton π − p → φn and the secondary pionnucleon πN → φN φ production processes as well as the effects of the nuclear φ and nucleon mean-field potentials. We find that the primary reaction channel π − p → φn dominates in the φ production off 12 C and 184 W target nuclei in the HADES acceptance window at incident pion momentum of 1.7 GeV/c. We calculate the momentum dependence of the absolute and relative (transparency ratio) φ meson yields from the above direct channel. The calculations have been performed for this initial pion momentum allowing for different options for the φN absorption cross section σ φN and different scenarios for the in-medium mass shifts of the φ meson and secondary neutron, produced together with φ in this channel. We demonstrate that the transparency ratio for the φ mesons has, contrary to the absolute cross sections, an insignificant sensitivity to the φ meson and secondary neutron in-medium mass shifts at φ momenta studied in the HADES experiment. On the other hand, we show that there are measurable changes in the transparency ratio due to the φN absorption cross section, which means that such relative observable can be useful to help determine this cross section from the data taken in the HADES experiment. arXiv:1806.00303v2 [nucl-th]

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Partial restoration of chiral symmetry in cold nuclear matter: theϕ-meson case

Cited by 4 publications

References 68 publications

$Υ$ and $η_b$ nuclear bound states

$Υ$ and $η_b$ nuclear bound states

$η_{c}$-nucleus bound states

Momentum dependence of pion-induced ϕ meson production on nuclei near threshold

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