Light Vector Mesons in Nuclear Matter

Hatsuda, Tetsuo; Shiomi, H.; Kuwabara, Hitoshi

doi:10.1143/ptp.95.1009

Cited by 77 publications

(107 citation statements)

References 35 publications

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“…The medium modification for φ-meson mass occurs due to their coupling to the hyperons, as they do not couple to the nucleons by OZI rule [11]. It is observed that the medium modification of the φ-meson mass is rather small as compared to the mass of the vector ω.…”

Section: In-medium Masses For ω and ρ Vector Mesonsmentioning

confidence: 93%

“…This Feynman part of the self energy, Π µν F is divergent and needs renormalization. For the ω meson, the tensor coupling is generally small as compared to the vector coupling to the nucleons [11], and hence is neglected in the present work. We use dimensional regularization to separate the divergent parts.…”

Section: In-medium Masses For ω and ρ Vector Mesonsmentioning

confidence: 99%

“…We employ a phenomenological subtraction procedure [10,11] to extract the finite part using the renormalization condition…”

Section: In-medium Masses For ω and ρ Vector Mesonsmentioning

confidence: 99%

“…With the inclusion of quantum corrections from the baryonic sector, however, one observes a drop in the vector meson masses in the medium in the Walecka model [10][11][12]. This medium modification of the vector meson masses plays an important role in the enhanced dilepton yield [13] for masses below the ρ resonance in the heavy ion collision experiments [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…We also examine the effect of quantum corrections on the in-medium vector meson masses in dense hyperon-rich matter in section IV, where it is observed that the medium modification to the strange vector meson (φ) is small compared to that of the vector ω meson. This is because, in the hyperonic matter with quantum effects taken into account [16], the masses of the hyperons remain rather insensitive to density, unlike the in-medium nucleon masses which change appreciably with density, and further, because the φ-mesons do not couple to the nucleons [11]. On the other hand, ω meson mass gets contribution also from the nucleonic sector.…”

Section: Introductionmentioning

confidence: 99%

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Vector meson masses in hot nuclear matter: the effect of quantum corrections

Mishra

Parikh

Greiner

2001

J. Phys. G: Nucl. Part. Phys.

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The medium modification of vector meson masses is studied taking into account the quantum correction effects for the hot and dense hadronic matter. In the framework of Quantum Hadrodynamics, the quantum corrections from the baryon and scalar meson sectors were earlier computed using a nonperturbative variational approach through a realignment of the ground state with baryon-antibaryon and sigma meson condensates. The effect of such corrections was seen to lead to a softer equation of state giving rise to a lower value for the compressibility and, an increase in the in-medium baryonic masses than would be reached when such quantum effects are not taken into account. These quantum corrections arising from the scalar meson sector result in an increase in the masses of the vector mesons in the hot and dense matter, as compared to the situation when only the vacuum polarisation effects from the baryonic sector are taken into account.

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Section: In-medium Masses For ω and ρ Vector Mesonsmentioning

confidence: 93%

Section: In-medium Masses For ω and ρ Vector Mesonsmentioning

confidence: 99%

“…We employ a phenomenological subtraction procedure [10,11] to extract the finite part using the renormalization condition…”

Section: In-medium Masses For ω and ρ Vector Mesonsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Vector meson masses in hot nuclear matter: the effect of quantum corrections

Mishra

Parikh

Greiner

2001

J. Phys. G: Nucl. Part. Phys.

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Thermal Photons and Lepton Pairs from Quark Gluon Plasma and Hot Hadronic Matter

et al. 2000

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The formulation of the real and virtual photon production rate from strongly interacting matter is presented in the framework of finite temperature field theory. The changes in the hadronic spectral function induced by temperature are discussed within the ambit of the Walecka type model, gauged linear and non-linear sigma models, hidden local symmetry approach, and QCD sum rule approach. The possibility of observing the direct thermal photon and lepton pairs from quark gluon plasma has been contrasted with those from hot hadronic matter with and without medium effects for various mass variation scenarios. At SPS energies, in-medium effects of different magnitude on the hadronic properties for the Walecka model, Brown Rho scaling, and Nambu scaling scenarios are conspicuously visible through the low invariant mass distribution of dileptons and transverse momentum spectra of photons. However, at RHIC energies the thermal photon (dilepton) spectra originating from quark gluon plasma overshines those from hadronic matter for large transverse momentum (invariant mass) irrespective of the models used for evaluating the finite temperature effects on the hadronic properties. It is thus expected that at both RHIC and LHC energies the formation of quark gluon plasma in the initial stages may indeed turn out to be a realistic scenario. Static dilepton spectra. 8.4. Photon and dilepton spectra with space-time evolution. 9. Summary and outlook. Appendix: Thermal propagators.

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Electromagnetic Transition Form Factors and Dilepton Decay Rates of Nucleon Resonances

et al. 2002

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Relativistic, kinematically complete phenomenological expressions for the dilepton decay rates of nucleon resonances with arbitrary spin and parity are derived in terms of the magnetic, electric, and Coulomb transition form factors. The dilepton decay rates of the nucleon resonances with masses below 2 GeV are estimated using the extended vector meson dominance (VMD) model for the transition form factors. The model provides a unified description of the photo-and electroproduction data, γ (γ * )N → N * , the vector meson decays, N * → N ϕ (ω), and the dilepton decays, N * → N + − . The constraints on the transition form factors from the quark counting rules are taken into account. The parameters of the model are fixed by fitting the available photo-and electroproduction data and using results of the multichannel partial-wave analysis of the π N scattering. Where experimental data are not available, predictions of the non-relativistic quark models are used as an input. The vector meson coupling constants of the magnetic, electric, and Coulomb types are determined. The dilepton widths and the dilepton spectra from decays of nucleon resonances with masses below 2 GeV are calculated. C 2002 Elsevier Science (USA)

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Light Vector Mesons in Nuclear Matter

Cited by 77 publications

References 35 publications

Vector meson masses in hot nuclear matter: the effect of quantum corrections

Vector meson masses in hot nuclear matter: the effect of quantum corrections

Thermal Photons and Lepton Pairs from Quark Gluon Plasma and Hot Hadronic Matter

Electromagnetic Transition Form Factors and Dilepton Decay Rates of Nucleon Resonances

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