0101884 - UJF-V 20043072 RIV US eng J - Journal Article
Adams, J. - Adler, C. - Chaloupka, Petr - Filip, P. - Lednický, R. - Šumbera, Michal
rho(0) production and possible modification in Au+Au and p+p collisions at root S-NN=200 GeV.
[Produkce rho(0) a možná modifikace ve srážkách Au+Au a pp při energii 200 GeV.]
Physical Review Letters. Roč. 92, č. 9 (2004), 092301. ISSN 0031-9007. E-ISSN 1079-7114
R&D Projects: GA ČR GA202/04/0793
Institutional research plan: CEZ:AV0Z1048901
Keywords : vector-mesons production * 205 GEV-C * inclusive production
Subject RIV: BF - Elementary Particles and High Energy Physics
Impact factor: 7.218, year: 2004

We report results on rho(770)(0)-->pi(+)pi(-) production at midrapidity in p+p and peripheral Au+Au collisions at roots(NN)=200 GeV. This is the first direct measurement of rho(770)(0)-->pi(+)pi(-) in heavy-ion collisions. The measured rho(0) peak in the invariant mass distribution is shifted by similar to40 MeV/c(2) in minimum bias p+p interactions and similar to70 MeV/c(2) in peripheral Au+Au collisions. The rho(0) mass shift is dependent on transverse momentum and multiplicity. The modification of the rho(0) meson mass, width, and shape due to phase space and dynamical effects are discussed.

Produkce rho ve střední rapiditě v pp a periferálních Au+Au srážkách ppři energii 200 GeV. Toto je první přímé měření rho ve srážkách těžkých iontů.
Permanent Link: http://hdl.handle.net/11104/0009269