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arXiv · 1208.5717

Production of K$^{*}$(892)$^{0}$ and $ϕ$(1020) in pp collisions at $\sqrt{s}=7$ TeV

ALICE Collaboration
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Abstract

The production of K$^{*}$(892)$^{0}$ and $ϕ$(1020) in pp collisions at $\sqrt{s}=7$ TeV was measured by the ALICE experiment at the LHC. The yields and the transverse momentum spectra d$^{2}$N/d$y$d$p_{\rm T}$ at midrapidity $|y|<0.5$ in the range $0<p_{\rm T}<6$ GeV/$c$ for K$^{*}$(892)$^{0}$ and $0.4<p_{\rm T}<6$ GeV/$c$ for $ϕ$(1020) are reported and compared to model predictions. Using the yield of pions, kaons, and Omega baryons measured previously by ALICE at $\sqrt{s}=7$ TeV, the ratios K$^{*}$/K$^{-}$, $ϕ$/K$^{*}$, $ϕ$/K$^{-}$, $ϕ/π^{-}$, and ($Ω$ + $\overlineΩ$)/$ϕ$ are presented. The values of the K$^{*}$/K$^{-}$, $ϕ$/K$^{*}$ and $ϕ$/K$^{-}$ ratios are similar to those found at lower centre-of-mass energies. In contrast, the $ϕ/π^{-}$ ratio, which has been observed to increase with energy, seems to saturate above 200 GeV. The ($Ω$ + $\overlineΩ$)/$ϕ$ ratio in the $p_{\rm T}$ range $1$-$5$ GeV/$c$ is found to be in good agreement with the prediction of the HIJING/BB v2.0 model with a strong colour field.

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ALICE Collaboration. 2017-04-03. Production of K$^{*}$(892)$^{0}$ and $ϕ$(1020) in pp collisions at $\sqrt{s}=7$ TeV. https://doi.org/10.1140/epjc%2Fs10052-012-2183-y

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