Study of in-medium $\omega$ meson properties in Ap, pA and AA collisions

Abstract

We propose to investigate the in-medium properties of vector $\omega$ mesons at the normal nuclear density in Ap(pA) collisions and at higher density in AA collisions at the ITEP accelerator facility TWAC. Using of the inverse Ap kinematics will permit us to study the $\omega$ meson production in a wide momentum interval included the not yet explored range of small meson momenta relative to the projectile nuclei where the mass modification effect in nuclear matter is expected to be the strongest. Momentum dependence of the in-medium $\omega$ meson width will be studied in the traditional pA kinematics. We intend to use the electromagnetic calorimeter for reconstruction of the $\omega$ meson invariant mass by detecting photons from the $\omega \to {\pi }^0\gamma \to 3\gamma$ decay. The model calculations and simulations with RQMD generator show feasibility of the proposed experiment. Available now intensity of the ion beams provides a possibility to collect large statistics and make decisive conclusion about the $\omega$ meson properties at density of normal nuclei. At the second stage of the investigation the $\omega$ meson properties will be studied in AA collisions at higher density. Interpretation of these measurements will be based on the results obtained in Ap(pA) interactions. Further investigation of the in-medium properties of light unflavored and charmed mesons can be performed at ITEP and at GSI(FAIR) where higher ion energies will be accessible in near future.

26 pages, 10 figures, 2 tables

References in corpus (16)

• Nucleon and hadron structure changes in the nuclear medium and impact on observables
• First observation of in-medium modifications of the omega meson
• Experimental Signature of Medium Modifications for rho and omega Mesons in the 12 GeV p + A Reactions
• phi photo-production from Li, C, Al, and Cu nuclei at Egamma=1.5 - 2.4 GeV
• rho^0 Production and Possible Modification in Au+Au and p+p Collisions at sqrt(s_NN) = 200 GeV
• Modification of the $\omega$-Meson Lifetime in Nuclear Matter
• Mass dependence of inclusive nuclear $\varphi$ photoproduction
• Light Vector Mesons in the Nuclear Medium
• Inclusive $\omega$ photoproduction from nuclei and $\omega$ in the nuclear medium
• The $\varphi$ meson width in the medium from proton induced $\varphi$ production in nuclei
• Omega attenuation in nuclei
• Photoproduction of phi mesons from nuclei
• Inclusive omega photoproduction off nuclei
• In-medium spectral change of omega mesons as a probe of QCD four-quark condensate
• Hadrons in Medium
• New method of studying slow strange meson properties in nuclear matter