Hadrons in Strongly Interacting Matter

Leupold, Stefan; Metag, V.; Mosel, U.

doi:10.1142/s0218301310014728

Cited by 202 publications

(242 citation statements)

References 207 publications

(297 reference statements)

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“…In particular light vector mesons have been studied extensively both on the theoretical and the experimental side; for recent reviews see e.g. [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

The impact of chirally odd condensates on the rho meson

et al. 2012

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Based on QCD sum rules we explore the consequences of a pure chiral restoration scenario for the ρ meson, where all chiral symmetry breaking condensates are dropped whereas the chirally symmetric condensates remain at their vacuum values. This pure chiral restoration scenario causes the drop of the ρ spectral moment by about 120 MeV. The complementarity of mass shift and broadening is discussed. A simple parametrization of the ρ spectral function leads to a width of about 600 MeV if no shift of the peak position is assumed.

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“…In particular light vector mesons have been studied extensively both on the theoretical and the experimental side; for recent reviews see e.g. [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

The impact of chirally odd condensates on the rho meson

et al. 2012

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“…In the low invariant mass region which is dominated by lepton pairs produced during the later stages of the collision, dilepton emission takes place due to the decay of vector mesons. Consequently, the spectral properties of vector mesons, the ρ meson in particular has been a subject of intense discussion [7,4,2,8]. We find that it is only for the π − π loop that one calculates the thermal self-energy loop for the vector mesons directly.…”

Section: Introductionmentioning

confidence: 93%

In-medium vector mesons and low mass lepton pairs from heavy ion collisions

Sarkar

Ghosh

2012

J. Phys.: Conf. Ser.

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Abstract.The ρ and ω meson self-energy at finite temperature and baryon density have been analysed for an exhaustive set of mesonic and baryonic loops in the real time formulation of thermal field theory. The large enhancement of spectral strength below the nominal ρ mass is seen to cause a substantial enhancement in dilepton pair yield in this mass region. The integrated yield after space-time evolution using relativistic hydrodynamics with quark gluon plasma in the initial state leads to a very good agreement with the experimental data from In-In collisions obtained by the NA60 collaboration. IntroductionColliding heavy ions at ultra-relativistic energies is the only way to produce and study bulk properties of strongly interacting matter. Systematic efforts, both theoretical and experimental over the last few decades [1,2] have addressed various facets of the thermodynamics of the underlying theory − QCD. The spectra of hadrons emitted after freeze-out of the fireball produced in heavy ion collisions have provided us with a wealth of information. This includes the recent discovery made by studying the elliptic flow of hadrons that the quark gluon plasma (QGP) produced in Au+Au collisions at RHIC actually behaves as a strongly interacting fluid [3] as opposed to a asymptotically free gas of quarks and gluons. However, by virtue of the fact that electromagnetic probes (real photons and dileptons) are emitted all through the lifetime of the fireball coupled with their low rescattering probability make them penetrating probes capable of mapping the space-time history of the collision [4]. Lepton pairs with both invariant mass and transverse momentum information are in fact preferable to real photons. Large mass pairs produced by Drell-Yan process and from the decays of heavy quarkonia are emitted early whereas pairs with low invariant mass radiated from thermal hadronic matter and Dalitz decays of hadrons are produced late in the collision. The invariant mass spectra of dileptons thus carry time information as displayed explicitly in [5] using the invariant mass dependence of the elliptic flow of lepton pairs.The rate of production of thermal dileptons is proportional to the two-point correlator of vector currents [6]. In the low invariant mass region which is dominated by lepton pairs produced during the later stages of the collision, dilepton emission takes place due to the decay of vector mesons. Consequently, the spectral properties of vector mesons, the ρ meson in particular has been a subject of intense discussion [7,4,2,8]. We find that it is only for the π − π loop that

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“…Reactions of this type are explored for the study of meson -nucleus interactions and for the investigation of hadron in-medium properties. A recent review of the in-medium properties of scalar and vector mesons derived from photoproduction and other reactions is given by Leupold, Mosel, and Metag [142]; results for the in-medium properties of nucleon resonances are summarized, e.g., in [143].…”

Section: Production In γA Reactionsmentioning

confidence: 99%

Production of η and η′ mesons on nucleons and nuclei

Krusche¹,

Wilkin²

2015

Progress in Particle and Nuclear Physics

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The production of η and η mesons in photon-and hadron-induced reactions on free and quasifree nucleons and on nuclei is reviewed. The extensive database on γN → ηN , for both proton and neutron targets, is described in detail and its implications for the search for N resonances much heavier than the dominant S 11 (1535) discussed. Though less is currently known about the production of the η or of ηπ pairs, these also offer tantalizing prospects in the search for the missing isobars. The more limited data available on pion-induced production are still necessary ingredients in the partial wave analysis discussed.The production of the η-meson in pp and pn collisions shows once again the strong influence of the S 11 (1535) isobar, which is in contrast to the relatively weak behaviour seen near threshold for η production. This difference is reflected in the important final state interaction effects of the η in nuclei that may even lead to this meson being "bound" in some systems. The evidence for this is reviewed for both γA and pA collisions. The inclusive photoproduction of η, η , and ηπ pairs from nuclei provides further information regarding the production mechanism and the interaction of the η and η with nuclei and the ηπ pairs may even allow access to low mass ηA systems that are forbidden in direct single-meson photoproduction.

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Hadrons in Strongly Interacting Matter

Cited by 202 publications

References 207 publications

The impact of chirally odd condensates on the rho meson

The impact of chirally odd condensates on the rho meson

In-medium vector mesons and low mass lepton pairs from heavy ion collisions

Production of η and η′ mesons on nucleons and nuclei

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