Abstract
We report on ω mesons’ production via radiative decay mode (ω → π0γ, π0 → 2γ) in \(\sqrt s \) = 200 GeV Au+Au collisions at RHIC-PHENIX. The main difficulty of this analysis is the huge combinatorial background inevitable for reconstructing particles from the three- body decay mode. The emphasis is on the feasibility study using both simulation and real data to search the best parameters that improve \(S/\sqrt B \). For this purpose, we examine several sets of energy and momentum cuts for selecting π0 and γ. To evaluate the remaining background, we consider three background sources; correlated/uncorrelated background and Ks0 contribution, then we subtract them. The amount of these contributions is determined by a fit on a mass spectrum. The result suggests that ω meson production is suppressed in central Au+Au collisions at high pT region.
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