Production of Phi mesons in p + p, p + Pb and central Pb + Pb collisions at E(beam) = 158-A-GEV.

(NA49 Collaboration) Afanasiev, SV; Anticic, T; Bachler, J; Barna, D; Barnby, LS; Bartke, J; Barton, RA; Betev, L; Bialkowska, H; Billmeier, A; Blume, C; Blyth, CO; Boimska, B; Bracinik, J; Brady, FP; Brun, R; Buncic, P; Carr, L; Cebra, D; Cooper, GE; Cramer, JG; Csato, P; Eckardt, V; Eckhardt, F; Ferenc, D; Fischer, HG; Fodor, Z; Foka, P; Freund, P; Friese, V; Ftacnik, J; Gal, J; Ganz, R; Gazdzicki, M; Gladysz, E; Grebieszkow, J; Harris, JW; Hegyi, S; Hlinka, V; Hohne, C; Igo, G; Ivanov, M; Jacobs, P; Janik, R; Jones, PG; Kadija, K; Kolesnikov, VI; Kowalski, M; Lasiuk, B; Levai, P; Malakhov, AI; Margetis, S; Markert, C; Mayes, BW; Melkumov, GL; Mischke, A; Molnar, J; Nelson, JM; Odyniec, G; Oldenburg, MD; Palla, G; Panagiotou, AD; Petridis, A; Pikna, M; Pinsky, L; Poskanzer, AM; Prindle, DJ; Puhlhofer, F; Reid, JG; Renfordt, R; Retyk, W; Ritter, HG; Rohrich, D; Roland, C; Roland, G; Rybicki, A; Sammer, T; Sandoval, A; Sann, H; Semenov, AY; Schafer, E; Schmitz, N; Seyboth, P; Sikler, F; Sitar, B; Skrzypczak, E; Snellings, R; Squier, GTA; Stock, R; Strmen, P; Strobele, H; Susa, T; Szarka, I; Szentpetery, I; Sziklai, J; Toy, M; Trainor, TA; Trentalange, S; Ullrich, T; Varga, D; Vassiliou, M; Veres, GI; Vesztergombi, G; Voloshin, S; Vranic, D; Wang, F; Weerasundara, DD; Wenig, S; Whitten, C; Xu, N; Yates, TA; Yoo, IK; Zimanyi, J; (2000) Production of Phi mesons in p + p, p + Pb and central Pb + Pb collisions at E(beam) = 158-A-GEV.. Physics Letters B, 491 (1-2). pp. 59-66. ISSN 0370-2693

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Abstract

Yields and phase space distributions of Phi mesons emitted from p+p (minimum bias trigger), p+Pb (at various centralities) and central Pb+Pb collisions are reported (E_beam=158AGeV). The decay Phi --> K+K was used for identification. The Phi/Pi ratio is found to increase by a factor of 3.0ą0.7 from inelastic p+p to central Pb+Pb. Significant enhancement in this ratio is also observed in subclasses of p+p events (characterized by high charged-particle multiplicity) as well as in the forward hemisphere of central p+Pb collisions. In Pb+Pb no shift or significant broadening of the Phi-peak is seen.

Item Type:

Article

Uncontrolled Keywords:

Phi mesons; p + p; p + Pb; central Pb + Pb collisions; E(beam) = 158-A-GEV

Subjects:

NATURAL SCIENCES > Physics

Divisions:

Division of Experimental Physics

Projects: