Production of K∗(892)0 and φ(1020) in pp collisions at √s = 7 TeV

The production of K∗(892)0 and ϕ(1020) in pp collisions at $\sqrt{s}=7~\mathrm{TeV}$ was measured by the ALICE experiment at the LHC. The yields and the transverse momentum spectra d2 N/dydp T at midrapidity |y|<0.5 in the range 0<p T<6 GeV/c for K∗(892)0 and 0.4<p T<6 GeV/c for ϕ(1020) are reported and compared to model predictions. Using the yield of pions, kaons, and Ω baryons measured previously by ALICE at $\sqrt{s}=7\ \mathrm{TeV}$ , the ratios K∗/K−, ϕ/K∗, ϕ/K−, ϕ/π −, and $(\Omega + \overline{\Omega })/\phi$ 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 $(\Omega + \overline {\Omega })/\phi$ ratio in the p T range 1–5 GeV/c is found to be in good agreement with the prediction of the $\mathrm{HIJING}/\mathrm{B}\overline{\mathrm{B}}$ v2.0 model with a strong colour field.