Strange meson enhancement in PbPb collisions

The NA44 Collaboration has measured yields and differential distributions of K +, K −, π +, π − in transverse kinetic energy and rapidity, around the center-of-mass rapidity in 158 A GeV/ c Pb+Pb collisions at the CERN SPS. A considerable enhancement of K + production per π is observed, as compared...

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Veröffentlicht in:	PHYSICS LETTERS B 1999-01, Vol.471 (1), p.6-12
Hauptverfasser:	Bearden, I., Bøggild, H., Boissevain, J., Conin, L., Dodd, J., Erazmus, B., Esumi, S., Fabjan, C.W., Ferenc, D., Fields, D.E., Franz, A., Gaardhøje, J.J., Hansen, A.G., Hansen, O., Hardtke, D., van Hecke, H., Holzer, E.B., Humanic, T.J., Hummel, P., Jacak, B.V., Jayanti, R., Kaimi, K., Kaneta, M., Kohama, T., Kopytine, M.L., Leltchouk, M., Ljubicic Jr, A., Lörstad, B., Maeda, N., Martin, L., Medvedev, A., Murray, M., Ohnishi, H., Paic, G., Pandey, S.U., Piuz, F., Pluta, J., Polychronakos, V., Potekhin, M., Poulard, G., Reichhold, D., Sakaguchi, A., Schmidt-Sørensen, J., Simon-Gillo, J., Sondheim, W., Sugitate, T., Sullivan, J.P., Sumi, Y., Willis, W.J., Wolf, K.L., Xu, N., Zachary, D.S.
Format:	Artikel
Sprache:	eng
Schlagworte:	High Energy Physics - Phenomenology ION-ION COLLISIONS Kaon LEAD IONS NUCLEAR PHYSICS AND RADIATION PHYSICS Particle production Physics PHYSICS OF ELEMENTARY PARTICLES AND FIELDS Pion Quark–gluon plasma Relativistic heavy ion collisions STRANGE MESONS Strangeness enhancement
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Zusammenfassung:	The NA44 Collaboration has measured yields and differential distributions of K +, K −, π +, π − in transverse kinetic energy and rapidity, around the center-of-mass rapidity in 158 A GeV/ c Pb+Pb collisions at the CERN SPS. A considerable enhancement of K + production per π is observed, as compared to p+ p collisions at this energy. To illustrate the importance of secondary hadron rescattering as an enhancement mechanism, we compare strangeness production at the SPS and AGS with predictions of the transport model RQMD.
ISSN:	0370-2693 1873-2445
DOI:	10.1016/S0370-2693(99)01327-1