Study of the jet production in the deep inelastic ep scattering at the ZEUS experiment

Jets in the deep inelastic electron-proton scattering were studied by means of the JADE algorithm in the range Q2>160 GeV2 and 0.01<x<0.1. The distributions of the polar and azimuth angles θ and φ of the jets were studied. One of the tew current jets at (2+1) jet events overlaps generally with the spectator jet. The difference between the polar angles of these two jets amounts in the mean to about 3 . The ZEUS data were corrected by means of Monte-Carlo data sets on the radiation of photons from the electron in the initial and final state, on hadronization effects, selection criteria, and effects by detector acceptances. The corrected (2+1) jet rate at the value ycut=0.02 was determined to R2+1corrected=22.4%±1.5%(stat.)-0.9%+3.4%(syst.). Under application of the theoretical calculation of the cross section for (2+1) jet events up to the order O(αs2) an estimation of the value for ΛMS of ΛMS=400 MeV±100 MeV(stat.)±200 MeV(syst.) was given. By this an estimation of the values of αs(Q2) of αs(405 GeV2)=0.173±0.017(stat.)±0.035(syst.) and αs(MZ2)=0.129±0.009(stat.)±0.017(syst.) results