J/ψ and ψ(2S) measurement in p+p collisions at = 200 and 500 GeV in the STAR experiment

In this paper, results on the J/ψ cross section and polarization measured via the dielectron decay channel at mid-rapidity in p + p collisions at = 200 and 500 GeV in the STAR experiment are discussed. The first measurement of ψ(2S) to J/ψ ratio at = 500 GeV is also reported.