Centrality Dependence of Charged Particle Multiplicity in Au-Au Collisions at <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><msqrt><mrow><mrow><msub><mrow><mi>s</mi></mrow><mrow><mi>NN</mi></mrow></msub></mrow></mrow></msqrt><mspace></mspace><mo>=</mo><mspace></mspace><mn>130</mn><mn></mn><mi></mi><mi>GeV</mi></math></span>

doi:10.1103/PhysRevLett.86.3500

Centrality Dependence of Charged Particle Multiplicity in Au-Au Collisions at $\sqrt{s_{NN}} = 130 GeV$

K. Adcox et al. (PHENIX Collaboration)

Phys. Rev. Lett. 86, 3500 – Published 16 April 2001

Abstract

We present results for the charged-particle multiplicity distribution at midrapidity in Au-Au collisions at $\sqrt{s_{NN}} = 130 GeV$ measured with the PHENIX detector at RHIC. For the $5 %$ most central collisions we find ${dN}_{ch} / d η_{| η = 0} = 622 \pm 1 (stat) \pm 41 (syst)$ . The results, analyzed as a function of centrality, show a steady rise of the particle density per participating nucleon with centrality.