Published in:
Physical Review Letters 92,9 (2004) 092301;
Link to original published article:
http://dx.doi.org/10.1103/PhysRevLett.92.092301
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.
Keywords
vector-meson production;; 205 gev-c;; inclusive production;; particle-production;; hadron-production;; k&p interactions;; au collisions;; pp;; resonances;; decays
Date of this Version
January 2004