arXiv subjects

the PHOBOS Collaboration

Publications and source records attributed to the PHOBOS Collaboration.

3 recordsLinked to original sources

arXiv2007

Cluster properties from two-particle angular correlations in p+p collisions at $\sqrt{s}$ = 200 and 410 GeV

We present results on two-particle angular correlations in proton-proton collisions at center of mass energies of 200 and 410 GeV. The PHOBOS experiment at the Relativistic Heavy Ion Collider has a uniquely large coverage for charged particles, giving the opportunity to explore the correlations at both short- and long-range scales. At both energies, a complex two-dimensional correlation structure in $Δη$ and $Δϕ$ is observed. In the context of an independent cluster model of short-range correlations, the cluster size and its decay width are extracted from the two-particle pseudorapidity correlation function and compared with previous measurements in proton-proton and proton-antiproton collisions, as well as PYTHIA and HIJING predictions.

nucl-ex↗

arXiv2004

Scaling of Charged Particle Production in d+Au Collisions at sqrt(s_NN) = 200 GeV

The measured pseudorapidity distributions of primary charged particles over a wide pseudorapidity range of |eta| < 5.4 and integrated charged particle multiplicities in d+Au collisions at sqrt(s_NN) = 200 GeV are presented as a function of collision centrality. The longitudinal features of d+Au collisions at sqrt(s_NN) = 200 GeV are found to be very similar to those seen in p + A collisions at lower energies. The total multiplicity of charged particles is found to scale with the total number of participants according to N^{dAu}_{ch} = 1/2 N^{pp}_{ch} and the energy dependence of the density of charged particles produced in the fragmentation region exhibits extensive longitudinal scaling.

nucl-ex↗

arXiv2004

Charged antiparticle to particle ratios near midrapidity in p+p collisions at sqrt(s_NN)=200 GeV

The ratios of the yields of primary charged antiparticles to particles have been obtained for pions, kaons, and protons near midrapidity for p+p collisions at sqrt(s_NN) = 200 GeV. Ratios of =1.000 +/- 0.012 (stat.) +/- 0.019 (syst.), =0.93 +/- 0.05 (stat.) +/- 0.03 (syst.), and =0.85 +/- 0.04 (stat.) +/- 0.03 (syst.) have been measured. The reported values represent the ratio of the yields averaged over the rapidity range of 0.1<y_{pi}<1.3 and 0<y_{K,p}<0.8, and for transverse momenta of 0.1<p_T^{pi,K}<1.0 GeV/c and 0.3<p_T^{p}<1.0 GeV/c. Within the uncertainties, all three ratios are consistent with the values measured in d+Au collisions at the same energy. The data are compared to results from other collision systems and energies.

nucl-ex↗