학술논문
Strangeness measurements with the PHOBOS experiment
Document Type
Article
Author
Veres, Gbor I; PHOBOS, the; Back, B B; Baker, M D; Ballintijn, M; Barton, D S; Betts, R R; Bickley, A A; Bindel, R; Busza, W; Carroll, A; Chai, Z; Decowski, M P; Garca, E; Gburek, T; George, N; Gulbrandsen, K; Halliwell, C; Hamblen, J; Hauer, M; Henderson, C; Hofman, D J; Hollis, R S; Hoyski, R; Holzman, B; Iordanova, A; Johnson, E; Kane, J L; Khan, N; Kulinich, P; Kuo, C M; Lin, W T; Manly, S; Mignerey, A C; Nouicer, R; Olszewski, A; Pak, R; Reed, C; Roland, C; Roland, G; Sagerer, J; Seals, H; Sedykh, I; Smith, C E; Stankiewicz, M A; Steinberg, P; Stephans, G S F; Sukhanov, A; Tonjes, M B; Trzupek, A; Vale, C; van, G J; Vaurynovich, S S; Verdier, R; Wenger, E; Wolfs, F L H; Wosiek, B; Woniak, K; Wysouch, B
Source
Journal of Physics G: Nuclear and Particle Physics; December 2006, Vol. 32 Issue: 12 pS69-S76, 8p
Subject
Language
ISSN
09543899; 13616471
Abstract
Recent results on identified particle production from the PHOBOS experiment at the relativistic heavy-ion collider (RHIC) are summarized. Transverse momentum spectra of pions, kaons, protons and antiprotons from Au+Au collisions at are presented close to mid-rapidity. Baryons have been found to have substantially harder transverse momentum spectra than mesons. The p/?+ratio reaches unity at high pT, which fits into a smooth trend together with measurements at lower and higher collision energies. At very low transverse momenta no significant excess of particle yield was found, compared to extrapolations from higher pT. The net proton yield at mid-rapidity appears to be proportional to the number of participant nucleons in Au+Au collisions. The PHOBOS acceptance and mass resolution for the meson at low pTwere studied in detail.