φ meson mass and decay width in nuclear matter

Cabrera, D.; Vacas, M. J. Vicente

doi:10.1103/physrevc.67.045203

Cited by 109 publications

(176 citation statements)

References 31 publications

(87 reference statements)

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“…The comparison of the ratios with the work of the Valencia group [2,14,15] results in an about 1.6 times smaller in-medium broadening of the φ compared to the findings using the Paryev model. In between those two models lie the first results from the ongoing Rossendorf Boltzmann-Uehling-Uhlenbeck (BUU) calculations [25].…”

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confidence: 49%

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φ-meson production and the in-medium φ-width in proton-nucleus collisions

Hartmann¹,

Kiselev²,

Paryev³

et al. 2010

AIP Conference Proceedings

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confidence: 49%

“…Investigations with elementary (γ,π,p) probes in nuclear collisions, in so-called cold static matter, can cause comparable changes in the properties [1,2,3,4]. Current overviews of this active research field are to be found in Refs.…”

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confidence: 99%

φ-meson production and the in-medium φ-width in proton-nucleus collisions

Hartmann¹,

Kiselev²,

Paryev³

et al. 2010

AIP Conference Proceedings

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“…Although originally the ρ meson properties were mostly investigated, nowadays the φ properties have got a lot of interest, because the medium renormalization in this case is more drastic than that of the ρ. Indeed, predictions of an increase of the φ width by a factor five or six [ 2,3] to ten [ 4], at normal nuclear matter density, have been made using different chiral approaches. Different reactions have been studied or suggested to test experimentally this large width [ 5,6,4,7,8,9].…”

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confidence: 99%

“…[ 3] and its extension to finite φ-meson momentum done in [ 9]. This model is based on the modification of theKK decay channel in the medium by means of a careful treatment of the in medium antikaon selfenergies [ 2].…”

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Measuring the ϕ meson width in the medium from p induced ϕ production in nuclei

2005

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We study the A dependence of the φ meson production cross section in proton nucleus reactios at energies just above threshold, which are accessible in an experimental facility like COSY. This A dependence has two sources: the distortion of the incident proton and the absorption of the φ in its way out of the nucleus. This second process reduces the cross section in about a factor two in heavy nuclei. Thus we show that the A dependence of the cross section contains valuable information on the φ width in the nuclear medium.The study of the properties of vector mesons in a nuclear medium is one of the subjects in hadron physics which receives continuous attention (see for instance Ref.[ 1]). Although originally the ρ meson properties were mostly investigated, nowadays the φ properties have got a lot of interest, because the medium renormalization in this case is more drastic than that of the ρ. Indeed, predictions of an increase of the φ width by a factor five or six [ 2, 3] to ten [ 4], at normal nuclear matter density, have been made using different chiral approaches. Different reactions have been studied or suggested to test experimentally this large width [ 5,6,4,7,8,9].The aim of the present work is to propose a new method to determine the φ width in the nuclear medium [ 10]. The traditional method in the works quoted above (except [ 9]) is to look for a broadening of the φ width reconstructed from the invariant mass of its decay products. Here, instead, we use a different philosophy and we investigate the A dependence of φ production in pA collisions, in a similar way as it was done in [ 9] with the φ photoproduction in nuclei, which is the subject of experimental investigation at Spring8/Osaka [ 11]. The advantage of performing the reaction slightly above threshold is that one can rule out the contribution from coherent φ production which might obscure the interpretation of the experimental results in [ 11]. The present reaction, with its particular kinematics, is amenable of experimental performance at facilities like COSY.In order to implement the relevant nuclear effects in the φ production cross section we will use a model based on many body techniques, successfully applied in the past in many works [ 12,13] to study the interaction of different particles with nuclei. The model assumes a local Fermi sea at each point in the nucleus and provides a very simple and accurate way to account for the Fermi motion of the initial nucleon and the Pauli blocking of the final ones. On the other hand, we have to take into account the distortion of the incoming nucleon and the final φ meson in the their way through the nucleus, which are

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Chiral approach to antikaons in dense matter

Tolós

Ramos

The IVth International Conference on Quarks and Nuclear Physics

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Antikaons in dense nuclear matter are studied using a chiral unitary approach which incorporates the s-and p-waves of theKN interaction. We include, in a self-consistent way, Pauli blocking effects, meson self-energies modified by nuclear short-range correlations and baryon binding potentials. We show that the on-shell factorization cannot be applied to evaluate the in-medium corrections to p-wave amplitudes. We also obtain an attractive shift for the Λ and Σ masses of -30 MeV at saturation density while the Σ * width gets sensibly increased to about 80 MeV. The moderate attraction developed by the antikaon does not support the existence of very deep and narrow bound states.

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φ meson mass and decay width in nuclear matter

Cited by 109 publications

References 31 publications

φ-meson production and the in-medium φ-width in proton-nucleus collisions

φ-meson production and the in-medium φ-width in proton-nucleus collisions

Measuring the ϕ meson width in the medium from p induced ϕ production in nuclei

Chiral approach to antikaons in dense matter

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