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rho(0) production and possible modification in Au+Au and p+p collisions at root S-NN=200 GeV

Adams, J; Adler, C; Aggarwal, MM; Ahammed, Z; Amonett, J; Anderson, BD; Arkhipkin, D; ... Zubarev, AN; + view all (2004) rho(0) production and possible modification in Au+Au and p+p collisions at root S-NN=200 GeV. Physical Review Letters , 92 (9) , Article 092301. 10.1103/PhysRevLett.92.092301. Green open access

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Abstract

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.

Type: Article
Title: rho(0) production and possible modification in Au+Au and p+p collisions at root S-NN=200 GeV
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.92.092301
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.92.092301
Additional information: © 2004 The American Physical Society
Keywords: VECTOR-MESON PRODUCTION, 205 GEV-C, INCLUSIVE PRODUCTION, PARTICLE-PRODUCTION, HADRON-PRODUCTION, AU COLLISIONS, PP, RESONANCES, DECAYS, ANNIHILATION
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/1338202
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