Production of K∗(892)0 and ϕ(1020) in pp collisions at sqrt(s)=7 TeVстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 28 сентября 2013 г.
Аннотация:The production of K∗(892)0 and φ(1020) in pp collisions at s√=7 TeV was measured by the ALICE experiment at the LHC.The yields and the transverse momentum spectra d2N/dydpT at midrapidity ∣∣y∣∣<0.5 in the range 0<pT<6 GeV/c for K∗(892)0 and 0.4<pT<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 s√=7 TeV, the ratios K∗/K−, φ/K∗, φ/K−, φ/π−, and (Ω+Ωˉ)/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/pi− ratio, which has been observed to increase with energy, seems to saturate above 200 GeV. The (Ω+Ωˉ)/φ ratio in the pT range 1-5 GeV/c is found to be in good agreement with the prediction of the HIJING/BBˉ v2.0 model with a strong colour field.