J/ψ production cross section and its dependence on charged-particle multiplicity in p + p collisions at s=200 GeV (English)

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We present a measurement of inclusive J/ψ production at mid-rapidity ( |y|<1 ) in p+p collisions at a center-of-mass energy of s=200 GeV with the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). The differential production cross section for J/ψ as a function of transverse momentum ( pT ) for 0