Medium modifications of kaons in pion matter

Abstract

Kaon in-medium masses and mean-field potentials are calculated in isotopically symmetric pion matter to one loop of chiral perturbation theory. The results are extended to RHIC temperatures using experimental data on $\pi K$ scattering phase shifts. The kaon in-medium broadening results in an acceleration of the $\varphi \to K\bar{K}$ decay. The increased apparent dilepton branching of the $\varphi$-mesons, observed recently by NA50, NA49, and the PHENIX collaborations at RHIC, is interpreted in terms of rescattering of secondary kaons inside of the pion matter.

5 pages, 2 figures, revised version accepted for publication in PRL

References in corpus (22)

• Hadron production in Au-Au collisions at RHIC
• Chiral Restoration in Hot and/or Dense Matter
• Evidence for a Soft Nuclear Equation-of-State from Kaon Production in Heavy Ion Collisions
• Probing the nuclear equation of state by $K^{+}$ production in heavy ion collisions
• Centrality Dependence of Charged Particle Multiplicity in Au-Au Collisions at sqrt(s_NN)=130 GeV
• Meson-meson scattering within one loop Chiral Perturbation Theory and its unitarization
• Nuclear kaon dynamics
• Medium Effects in Kaon and Antikaon Production in Nuclear Collisions at Subthreshold Beam Energies
• Kaon flow as a probe of the kaon potential in nuclear medium
• Sideward flow of K+ mesons in Ru+Ru and Ni+Ni reactions near threshold
• Enhanced Out-of-plane Emission of K+ Mesons observed in Au+Au Collisions at 1 AGeV
• Centrality Dependence of Charged Particle Multiplicity at Mid-Rapidity in Au+Au Collisions at sqrt(s_NN) = 130 GeV
• Phi meson production in relativistic heavy ion collisions
• Rescattering of Vector Meson Daughters in High Energy Heavy Ion Collisions
• Phi meson propagation in a hot hadronic gas
• Seeing the QCD phase transition with phi mesons
• Consequences of covariant kaon dynamics in heavy ion collisions
• Chiral symmetry and the pion gas virial expansion
• Enhanced Strange Particle Yields - Signal of a Phase of Massless Particles ?
• Leptonic Observables in Ultra-Relativistic Heavy Ion Collisions
• Phi meson production at RHIC
• Measuring hadron properties at finite temperature

Cited by in corpus (14)

• Kaon production in heavy ion reactions at intermediate energies
• Strange mesons in nuclear matter at finite temperature
• $D$-mesons and charmonium states in hot pion matter
• $\varphi$ meson self-energy in nuclear matter from $\varphi N$ resonant interactions
• Strong Couplings of X(3872)_{J=1,2} and a New Look at J/psi Suppression in Heavy Ion Collisions
• Properties of strange vector mesons in dense and hot matter
• Squeezed back-to-back correlation between bosons and antibosons with different in-medium masses in high-energy heavy-ion collisions
• Medium effects on phi decays to dilepton and kaon-antikaon pairs in relativistic heavy ion reactions
• Squeezed back-to-back correlation of $\bqD^0{\bar \bqD}^0$ in relativistic heavy-ion collisions
• Effect of in-medium mass-shift on transverse-momentum spectrum and elliptic anisotropy of $\varphi$ meson
• Squeezed spectra of bosons and antibosons with different in-medium masses
• Density resummation of perturbation series in a pion gas to leading order in chiral perturbation theory
• Squeezed back-to-back correlations of $K^{+}$$K^{-}$ in d+Au collisions at $\sqrt{s_{NN}}=200$ GeV and Au+Au collisions at $\sqrt{s_{NN}}=62.4$ GeV
• In-medium properties of the phi meson with phi N resonant contributions