$K^{\ast }(892{)}^0$ meson production in inelastic $p+p$ interactions at 40 and 80 GeV/$c$ beam momenta measured by NA61/SHINE at the CERN SPS

Abstract

Measurements of $K^{\ast }(892{)}^0$ resonance production via its $K^{+}{\pi }^{-}$ decay mode in inelastic $p+p$ collisions at beam momenta 40 and 80 GeV/$c$ ($\sqrt{s_{NN}}=8.8$ and 12.3 GeV) are presented. The data were recorded by the NA61/SHINE hadron spectrometer at the CERN Super Proton Synchrotron. The \textit{template} method was used to extract the $K^{\ast }(892{)}^0$ signal. Transverse momentum and rapidity spectra were obtained. The mean multiplicities of $K^{\ast }(892{)}^0$ mesons were found to be $(35.1\pm 1.3(\mathrm{stat})\pm 3.6(\mathrm{sys}))\cdot 10^{-3}$ at 40 GeV/$c$ and $(58.3\pm 1.9(\mathrm{stat})\pm 4.9(\mathrm{sys}))\cdot 10^{-3}$ at 80 GeV/$c$. The NA61/SHINE results are compared with the EPOS1.99 and Hadron Resonance Gas models as well as with world data. The transverse mass spectra of $K^{\ast }(892{)}^0$ mesons and other particles previously reported by NA61/SHINE were fitted within the Blast-Wave model. The transverse flow velocities are close to 0.1--0.2 of the speed of light and are significantly smaller than the ones determined in heavy nucleus-nucleus interactions at the same beam momenta.

arXiv commentversion published in Eur. Phys. J. C

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Cited by in corpus (1)

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