Kaon production and kaon to pion ratio in Au+Au collisions at s(NN)**1/2 = 130-GeV - INSPIRE

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Kaon production and kaon to pion ratio in Au+Au collisions at s(NN)**1/2 = 130-GeV

STAR

Collaboration

•

C. Adler

Jun, 2002

6 pages

Published in:

Phys.Lett.B 595 (2004) 143-150

e-Print:

nucl-ex/0206008 [nucl-ex]

DOI:

10.1016/j.physletb.2004.06.044

Experiments:

BNL-RHIC-STAR

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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^+/\pi^- = 0.161 \pm 0.002 {\rm (stat)} \pm 0.024 {\rm (syst)}

and

K^-/\pi^- = 0.146 \pm 0.002 {\rm (stat)} \pm 0.022 {\rm (syst)}

for the most central collisions. The

K^+/\pi^-

ratio is lower than the same ratio observed at the SPS while the

K^-/\pi^-

is higher than the SPS result. Both ratios are enhanced by about 50% relative to p+p and

\bar{\rm p}

+p collision data at similar energies.

Note:

6 pages, 3 figures, 1 table

25.75.-q
25.75.Dw
nucleus nucleus: colliding beams
scattering: heavy ion
gold
K: hadroproduction
hadron: multiple production
rapidity: central region
mass spectrum: transverse
multiplicity: density

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