Production of phi-mesons in p + p, p + Pb and central Pb + Pb collisions at E-beam=158 A GeV

Authors
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
Citation
Sv. Afanasiev et al., Production of phi-mesons in p + p, p + Pb and central Pb + Pb collisions at E-beam=158 A GeV, PHYS LETT B, 491(1-2), 2000, pp. 59-66
Citations number
32
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS B
ISSN journal
03702693 → ACNP
Volume
491
Issue
1-2
Year of publication
2000
Pages
59 - 66
Database
ISI
SICI code
0370-2693(20001012)491:1-2<59:POPIP+>2.0.ZU;2-W
Abstract
Yields and phase space distributions of phi -mesons emitted from p + p (min imum bias trigger), p + Pb (at various centralities) and central Pb + Pb co llisions are reported (E-beam = 158 A GeV). The decay phi --> K+K- was used for identification. The phi/pi ratio is found to increase by a factor of 3 .0 +/- 0.7 from inelastic p + p to central Pb + Pb. Significant enhancement in this ratio is also observed in subclasses of p + p events (characterize d by high charged-particle multiplicity) as well as in the forward hemisphe re of central p + Pb collisions. In Pb + Pb no shift or significant broaden ing of the phi -peak is seen. (C) 2000 Published by Elsevier Science B.V.