Kaon production and kaon to pion ratio in Au+Au collisions at {radical}(s{sub NN})=130 GeV
Mid-rapidity transverse mass spectra and multiplicity densities of charged and neutral kaons are reported for Au+Au collisions at {radical}s{sub NN}=130 GeV at RHIC. The spectra are exponential in transverse mass, with an inverse slope of about 280 MeV in central collisions. The multiplicity densities for these particles scale with the negative hadron pseudo-rapidity density. The charged kaon to pion ratios are K{sup +}/{pi}{sup -} = 0.161 {+-} 0.002(stat) {+-} 0.024(syst) and K{sup -}/{pi}{sup -} = 0.146 {+-} 0.002(stat) {+-} 0.022(syst) for the most central collisions. The K{sup +}/{pi}{sup -} ratio is lower than the same ratio observed at the SPS while the K{sup -}/{pi}{sup -} is higher than the SPS result. Both ratios are enhanced by about 50% relative to p+p and {bar p}+p collision data at similar energies.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Director. Office of Science. Office of Nuclear Physics. Office of High Energy Physics; National Science Foundation (NSF); Bundesministerium fuer Bildung und Forschung Germany, Institut National de la Physique Nucleaire et de la Physique des Particules France, United Kingdom Engineering and Physical Sciences Research Council, Fundacao de Amparo a Pesquisa do Estado de Sao Paulo Brazil, Russian Ministry of Science and Technology (US)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 841108
- Report Number(s):
- LBNL-56064; R&D Project: NRNC; TRN: US0502352
- Journal Information:
- Physical Letters B, Vol. 595; Other Information: Submitted to Physical Letters B: Volume 595, Journal Publication Date: 2004; PBD: 13 Jun 2002
- Country of Publication:
- United States
- Language:
- English
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