Abstract
The production of K^{0}_{S} mesons in inelastic p+p collisions at beam momentum 158 text{ GeV }/c (sqrt{s_{NN}}=17.3 text{ GeV }) was measured with the NA61/SHINE spectrometer at the CERN Super Proton Synchrotron. Double-differential distributions were obtained in transverse momentum and rapidity. The mean multiplicity of K^{0}_{S} was determined to be 0.162 pm 0.001 (stat.) pm 0.011 (sys.). The results on K^{0}_{S} production are compared with model predictions (EPOS 1.99, SMASH 2.0, PHSD and UrQMD 3.4 models) as well as with published world data.
Highlights
Kaons contain strange or anti-strange valence quarks, which are both not present in the initial state of collisions between nucleons and nuclei
At sufficiently high collision energy, the evolution of the fireball is expected to proceed via an intermediate partonic phase, the quarkgluon plasma (QGP)
It was predicted that the onset of deconfinement is located in the few GeV energy range [3]
Summary
Kaons contain strange or anti-strange valence quarks, which are both not present in the initial state of collisions between nucleons and nuclei. At sufficiently high collision energy, the evolution of the fireball is expected to proceed via an intermediate partonic phase, the quarkgluon plasma (QGP). Investigating these reactions will shed light on the differences between hadronic and partonic matter and the characteristics of the phase transition between them. In this paper we present the first results of production in p+p collisions at 158 GeV, which will be used later as the reference for comparison with production at lower energies and constitutes the first step of the energy scan of production in p+p interactions. The momentum in the laboratory frame is denoted plab and t√he collision energy per nucleon pair in the centre of mass by sN N
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