Kaon production and kaon to pion ratio in Au+Au collisions at {radical}{ovr 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}{ovr 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 pesudo-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. The ratios are enhanced by about 50% relative to p+p and {anti p}+p collision data at similar energies.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 961304
- Report Number(s):
- ANL/HEP/JA-46397; PYLBAJ; TRN: US1003438
- Journal Information:
- Phys. Lett. B, Vol. 595, Issue Aug. 12, 2004; ISSN 0370-2693
- Country of Publication:
- United States
- Language:
- ENGLISH
Similar Records
Pion, kaon, proton and anti-proton transverse momentum distributions from p+p and d+Au collisions at {radical}{ovr s}{sub NN} = 200 GeV.
Strange anti-particle to particle ratios at mid-rapidity in {radical} {ovr s} {sub NN} = 130 GeV Au+Au collisions.