The PHENIX Collaboration has measured the ratio of the yields of ψ(2S) to ψ(1S) mesons produced in p+p, p+Al, p+Au, and 3He+Au collisions at √sNN=200 GeV over the forward and backward rapidity intervals 1.2<|y|<2.2. We find that the ratio in p+p collisions is consistent with measurements at other collision energies. In collisions with nuclei, we find that in the forward (p-going or 3He-going) direction, the relative yield of ψ(2S) mesons to ψ(1S) mesons is consistent with the value measured in p+p collisions. However, in the backward (nucleus-going) direction, the ψ(2S) meson is preferentially suppressed by a factor of ∼2. This suppression is attributed in some models to the breakup of the weakly bound ψ(2S) meson through final-state intera...
Production of π0 and η mesons has been measured at midrapidity in Cu+Au collisions at √sNN=200GeV. M...
Photoproduction reactions occur when the electromagnetic field of a relativistic heavy ion interacts...
We report on the event structure and double helicity asymmetry (ALL) of jet production in longitudin...
The invariant yields, dN/dy, for J/ψ production at forward rapidity (1.2<|y|<2.2) in U+U collisions ...
PHENIX reports differential cross sections of μμ pairs from semileptonic heavy-flavor decays and the...
Back-to-back hadron pair yields in d+Au and p+p collisions at √sNN=200 GeV were measured with the P...
Background: Heavy-flavor production in p+p collisions is a good test of perturbative-quantum- chrom...
Muon production at forward rapidity (1.5≤|η|≤1.8) has been measured by the PHENIX e...
Muon production at forward rapidity (1.5≤|η|≤1.8) has been measured by the PHENIX e...
The second Fourier component v(2) of the azimuthal anisotropy with respect to the reaction plane is ...
We present a detailed measurement of charged two-pion correlation functions in 0%-30% centrality $\s...
Dihadron and isolated direct photon-hadron angular correlations are measured in p+p collisions at √s...
Neutral-pion pi(0) spectra were measured at midrapidity (vertical bar y vertical bar < 0.35) in A...
We present STAR measurements of the azimuthal anisotropy parameter $v_2$ for pions, kaons, protons, ...
Photoproduction reactions occur when the electromagnetic field of a relativistic heavy ion interacts...
Production of π0 and η mesons has been measured at midrapidity in Cu+Au collisions at √sNN=200GeV. M...
Photoproduction reactions occur when the electromagnetic field of a relativistic heavy ion interacts...
We report on the event structure and double helicity asymmetry (ALL) of jet production in longitudin...
The invariant yields, dN/dy, for J/ψ production at forward rapidity (1.2<|y|<2.2) in U+U collisions ...
PHENIX reports differential cross sections of μμ pairs from semileptonic heavy-flavor decays and the...
Back-to-back hadron pair yields in d+Au and p+p collisions at √sNN=200 GeV were measured with the P...
Background: Heavy-flavor production in p+p collisions is a good test of perturbative-quantum- chrom...
Muon production at forward rapidity (1.5≤|η|≤1.8) has been measured by the PHENIX e...
Muon production at forward rapidity (1.5≤|η|≤1.8) has been measured by the PHENIX e...
The second Fourier component v(2) of the azimuthal anisotropy with respect to the reaction plane is ...
We present a detailed measurement of charged two-pion correlation functions in 0%-30% centrality $\s...
Dihadron and isolated direct photon-hadron angular correlations are measured in p+p collisions at √s...
Neutral-pion pi(0) spectra were measured at midrapidity (vertical bar y vertical bar < 0.35) in A...
We present STAR measurements of the azimuthal anisotropy parameter $v_2$ for pions, kaons, protons, ...
Photoproduction reactions occur when the electromagnetic field of a relativistic heavy ion interacts...
Production of π0 and η mesons has been measured at midrapidity in Cu+Au collisions at √sNN=200GeV. M...
Photoproduction reactions occur when the electromagnetic field of a relativistic heavy ion interacts...
We report on the event structure and double helicity asymmetry (ALL) of jet production in longitudin...