Multiplicity dependence of the pion source in S + A collisions at the CERN SPS

The emission of pions from relativistic heavy-ion collisions of S + S, S + Ag and S + Pb at 200 GeV/nucleon is characterized using two-particle interferometry. The multiplicity dependence of the pion source parameters near mid-rapidity is studied. The transversal and longitudinal source parameters,...

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Detalles Bibliográficos
Autores principales: Kaimi, K, Bøggild, H, Boissevain, J G, Cherney, M, Dodd, J R, Esumi, S C, Fabjan, Christian Wolfgang, Fields, D E, Franz, A, Holzer, B, Humanic, T J, Jacak, B V, Jayanti, R, Kalechofsky, H, Kobayashi, T, Lee, Y Y, Leltchouk, M, Lörstad, B, Maeda, N, Medvedev, A, Miyabayashi, A, Murray, M, Nishimura, S, Noteboom, E, Pandey, S U, Piuz, François, Polychronakos, V, Potekhin, M V, Poulard, G, Sakaguchi, A, Schmidt-Sørensen, J, Simon-Gillo, J, Sondheim, W E, Sugitate, T, Sullivan, J P, Sumi, Y, van Hecke, H, Willis, W J, Wolf, K, Xu, N
Lenguaje:eng
Publicado: 1997
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1007/s002880050507
http://cds.cern.ch/record/319351
Descripción
Sumario:The emission of pions from relativistic heavy-ion collisions of S + S, S + Ag and S + Pb at 200 GeV/nucleon is characterized using two-particle interferometry. The multiplicity dependence of the pion source parameters near mid-rapidity is studied. The transversal and longitudinal source parameters, $R_t$ and $R_l$, show a clear increase with the particle multiplicity. The multiplicity dependence is weaker than that expected from a simple model of a freeze-out at a constant density. % The transversal and longitudinal source parameters $R_t$ and $R_l$, show % a clear increase with the particle multiplicity, consistent with the model % of freeze-out at a constant density.

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