On the K^+_- meson production from the quark-gluon plasma phase in ultra-relativistic heavy-ion collisions

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dc.creatorBerdnikov, A. Ya.
dc.creatorBerdnikov, Ya. A.
dc.creatorIvanov, A. N.
dc.creatorKosmach, V. F.
dc.creatorSamsonov, V. M.
dc.creatorTroitskaya, N. I.
dc.date1999-12-05
dc.date.accessioned2026-07-07T04:09:01Z
dc.date.available2026-07-07T04:09:01Z
dc.descriptionAn abundance of the strangeness that can be induced in a thermalized quark-gluon plasma (QGP) is considered as a signal of the QGP phase appearing in the intermediate state of ultra-relativistic heavy-ion collisions. As a quantitative characteristic of this signal we take the ratio R_{K^+ K^-} = N_{K^+}/N_{K^-} of the multiplicities of the production of K^+_- mesons. This ratio is evaluated for a thermalized QGP phase of QCD and for the quark-gluon system escaped from the QGP phase. For a thermalized QGP phase the ratio R_{K^+ K^-} has been found as a smooth function of a 3-momentum of the K^+_- mesons and a temperature ranging the values from the region 160 MeV < T <200 MeV. We show that at the temperature T= 175 MeV our prediction for the ratio R_{K^+K^-}(q,T = 175) = 1.80^{+ 0.04}_{-0.18} agrees good with the experimental data of NA49 and NA44 Collaborations on central ultra-relativistic Pb-Pb collisions at 158 GeV per nucleon: R^{\exp}_{K^+K^-} = 1.80\pm 0.10. For the ratio of the K^+ and π^+ multiplicities we have obtained the value R_{K^+π^+}(q,T = 175) = 0.134\pm 0.014 agreeing good with the experimental data of NA35 Collaboration on the nucleus-nucleus collisions at 200 GeV per nucleon R^{\exp}_{K^+π^+} = 0.137\pm 0.008.
dc.description16 pages, no figers, Latex
dc.identifierhttps://arxiv.org/abs/hep-ph/9912246
dc.identifierhttp://arxiv.org/abs/hep-ph/9912246
dc.identifierActa Phys.Slov. 52 (2002) 143-160
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/49692
dc.subjectHigh Energy Physics - Phenomenology
dc.titleOn the K^+_- meson production from the quark-gluon plasma phase in ultra-relativistic heavy-ion collisions
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