Abstract
Mid-rapidity transverse mass spectra and multiplicity densities of charged and neutral kaons are reported for Au+Au collisions at sNN=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+/π-=0.161±0.002(stat) ±0.024(syst) and K-/π-=0.146±0.002(stat) ±0.022(syst) for the most central collisions. The K+/ π- ratio is lower than the same ratio observed at the SPS while the K-/π- is higher than the SPS result. The ratios are enhanced by about 50% relative to p+p and p̄+p collision data at similar energies.
Original language | English |
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Pages (from-to) | 143-150 |
Number of pages | 8 |
Journal | Physics Letters B |
Volume | 595 |
Issue number | 1-4 |
DOIs | |
State | Published - Aug 12 2004 |
Externally published | Yes |
Funding
We wish to thank the RHIC Operations Group and the RHIC Computing Facility at Brookhaven National Laboratory, and the National Energy Research Scientific Computing Center at Lawrence Berkeley National Laboratory for their support. This work was supported by the Division of Nuclear Physics and the Division of High Energy Physics of the Office of Science of the US Department of Energy, the United States National Science Foundation, the Bundesministerium fuer Bildung und Forschung of Germany, the Institut National de la Physique Nucleaire et de la Physique des Particules of France, the United Kingdom Engineering and Physical Sciences Research Council, Fundacao de Amparo a Pesquisa do Estado de Sao Paulo, Brazil, and the Russian Ministry of Science and Technology.
Funders | Funder number |
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Division of Nuclear Physics | |
Russian Ministry of Science and Technology | |
National Science Foundation | |
U.S. Department of Energy | |
Office of Science | |
Engineering and Physical Sciences Research Council | |
Fundação de Amparo à Pesquisa do Estado de São Paulo | |
Bundesministerium für Bildung und Forschung | |
Institut National de Physique Nucléaire et de Physique des Particules |
Keywords
- 25.75.-q
- 25.75.Dw