Measurement of neutral mesons in p+p collisions at √s=200GeV and scaling properties of hadron production

PHENIX Collaboration

Research output: Contribution to journalArticlepeer-review

224 Scopus citations


The PHENIX experiment at the Relativistic Heavy Ion Collider has measured the invariant differential cross section for production of KS0, ω, η, and φ mesons in p+p collisions at √s=200GeV. Measurements of ω and φ production in different decay channels give consistent results. New results for the ω are in agreement with previously published data and extend the measured pT coverage. The spectral shapes of all hadron transverse momentum distributions measured by PHENIX are well described by a Tsallis distribution functional form with only two parameters, n and T, determining the high-pT and characterizing the low-pT regions of the spectra, respectively. The values of these parameters are very similar for all analyzed meson spectra, but with a lower parameter T extracted for protons. The integrated invariant cross sections calculated from the fitted distributions are found to be consistent with existing measurements and with statistical model predictions.

Original languageEnglish
Article number052004
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number5
StatePublished - 16 Mar 2011
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)


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