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

Abstract

The production of K*(892)\).0\) and \(\phi\).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 \(d^2 N/dydp_T\) 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 \(\phi\).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 \(K^*/K^-, \phi/K^*, \phi/K^-, \phi/\pi^-\). and \(\Omega + anti-\Omega)/\phi\) are presented. The values of the \(K^*/K^-, \phi/K^*\) and \(\phi/K^-\) ratios are similar to those found at lower centre-of-mass energies. In contrast, the \(\phi/\pi^-\) ratio, which has been observed to increase with energy, seems to saturate above 200 GeV. The \(\Omega + anti-\Omega)/\phi\) ratio in the \(p_T\) range 1-5 GeV/c is found to be in good agreement with the prediction of the HIJING/\).\bar{B}\) v2.0 model with a strong colour field.