Production of K?/sup>(892)0 and ?(1020) in pp collisions at equation-source format-t-e-x
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文摘
The production of K?/sup>(892)0 and ?(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?/sup>(892)0 and 0.4<p T<6?GeV/c for ?(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?/sup>/K?/sup>, ?/K?/sup>, ?/K?/sup>, ?/π ?/sup>, and $(\Omega + \overline{\Omega })/\phi$ are presented. The values of the K?/sup>/K?/sup>, ?/K?/sup> and ?/K?/sup> ratios are similar to those found at lower centre-of-mass energies. In contrast, the ?/π ?/sup> 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- 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.

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