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

Submission Date: 
28/08/2012
Article Information
Submission Form
System: 
p-p
Energy: 
7 TeV
Abstract Plain Text: 

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^2N/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/BB v2.0 model with a strong colour field.