Experimental Signature of Medium Modifications for<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>ρ</mml:mi></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>ω</mml:mi></mml:math>Mesons in the 12 GeV<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mo>+</mml:mo><mml:mi>A</mml:mi></mml:math>Reactions

Naruki, M.; Fukao, Y.; Funahashi, H.; Ishino, M.; Kanda, H.; Kitaguchi, Masaaki; Mihara, S.; Miwa, K.; Miyashita, T. S.; Murakami, T.; Nakura, T.; Sakuma, F.; Togawa, M.; Yamada, Shigeru; Yoshimura, Y.; En’yo, H.; Muto, R.; Tabaru, T.; Yokkaichi, S.; Chiba, J.; Ieiri, M.; Sasaki, O.; Sekimoto, M.; Tanaka, Kazuhiro; Hamagaki, H.; Ozawa, K.

doi:10.1103/physrevlett.96.092301

Cited by 172 publications

(83 citation statements)

References 27 publications

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“…Since this term is introduced phenomenologically to simulate the suppression of the vector potential in RBHF [41], it would be necessary to introduce other types of coupling, such as the scalar meson-vector meson coupling, σ 2 ω 2 [28,69]. The scalar-vector coupling acts to modify the in-medium vector meson mass [21,74]. It may be interesting to invoke the results of strong coupling lattice QCD with finite coupling effects, where the plaquette contribution is found to generate the vector potential [75].…”

Section: Summary and Discussionmentioning

confidence: 99%

Λhypernuclei and neutron star matter in a chiral SU(3) relativistic mean field model with a logarithmic potential

et al. 2010

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We develop a chiral SU(3) symmetric relativistic mean field model with a logarithmic potential of scalar condensates. Experimental and empirical data of symmetric nuclear matter saturation properties, bulk properties of normal nuclei, and separation energies of single-and double-hypernuclei are well explained. The nuclear matter equation of state (EOS) is found to be softened by σ ζ mixing which comes from determinant interaction. The neutron star matter EOS is further softened by hyperons.

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Section: Summary and Discussionmentioning

confidence: 99%

Λhypernuclei and neutron star matter in a chiral SU(3) relativistic mean field model with a logarithmic potential

et al. 2010

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“…[17] and [18]. In contrast, the KEK team had earlier reported an attractive mass shift of the ρ in [19] and [20]. As explained in detail in Ref.…”

Section: Introductionmentioning

confidence: 93%

K̄*mesons in dense matter

et al. 2010

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We study the properties ofK * mesons in nuclear matter using a unitary approach in coupled channels within the framework of the local hidden gauge formalism and incorporating theKπ decay channel in matter. The in-mediumK * N interaction accounts for Pauli blocking effects and incorporates theK * self-energy in a self-consistent manner. We also obtain theK * (off-shell) spectral function and analyze its behavior at finite density and momentum. At a normal nuclear matter density, theK * meson feels a moderately attractive potential, while theK * width becomes five times larger than in free space. We estimate the transparency ratio of the γ A → K + K * − A reaction, which we propose as a feasible scenario at the present facilities to detect changes in the properties of theK * meson in nuclear medium.

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“…Using a 12-GeV proton beam at KEK, the E325 Collaboration reported a significant reduction in the ρ mass [14]. However, with a 1-3.5-GeV incident-energy photon beam at JLab, the CLAS Collaboration [15,16], using an absolutely normalized background subtraction procedure, found not a significant mass shift but rather a moderate broadening of the dilepton excess spectrum associated with ρ decays (cf.…”

Section: Introductionmentioning

confidence: 99%

Medium modifications of theρmeson in nuclear photoproduction

et al. 2010

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We extend our recent study of dilepton invariant-mass spectra from the decays of ρ mesons produced by photon reactions off nuclei. We specifically focus on experimental spectra as recently measured by the CLAS Collaboration at the Thomas Jefferson National Accelerator Facility using carbon and iron nuclei. Building on our earlier work, we broaden our description to a larger set of observables to identify sensitivities to the medium effects predicted by microscopic calculations of the ρ spectral function. We compute mass spectra for several target nuclei and study the spectral shape as a function of the three-momentum of the outgoing lepton pair. We also compute the so-called nuclear transparency ratio, which provides an alternative means (and thus consistency check) of estimating the ρ width in the cold nuclear medium.

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Experimental Signature of Medium Modifications forρandωMesons in the 12 GeVp+AReactions

Cited by 172 publications

References 27 publications

Λhypernuclei and neutron star matter in a chiral SU(3) relativistic mean field model with a logarithmic potential

Λhypernuclei and neutron star matter in a chiral SU(3) relativistic mean field model with a logarithmic potential

K̄*mesons in dense matter

Medium modifications of theρmeson in nuclear photoproduction

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