Measurement of Neutral Mesons in p+p Collisions at s = 200 GeV and Scaling Properties of Hadron Production
- University of Colorado, Boulder
- ORNL
- University of Tennessee, Knoxville (UTK) & Oak Ridge National Laboratory (ORNL)
- Oak Ridge National Laboratory (ORNL)
- University of Tennessee, Knoxville (UTK)
The PHENIX experiment at the Relativistic Heavy Ion Collider has measured the invariant differential cross section for production of K{sub S}{sup 0}, {omega}, {eta}', and {phi} mesons in p+p collisions at {radical}s = 200 GeV. Measurements of {omega} and {phi} production in different decay channels give consistent results. New results for the {omega} are in agreement with previously published data and extend the measured p{sub T} 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-p{sub T} and characterizing the low-p{sub T} 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.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 1009477
- Journal Information:
- Physical Review D, Vol. 83, Issue 5; ISSN 1550--7998
- Country of Publication:
- United States
- Language:
- English
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