The azimuthal correlation between the leading jet and the scattered lepton in deep inelastic scattering at HERA

Preliminary results of the measurement of inclusive jet production in deep inelastic $ep$ scattering at HERA collected with the ZEUS detector will be presented. The data feature $e^{pm}p$ collisions at a center-of-mass energy of $sqrt{s} = 318 ;mathrm{GeV}$ for an integrated luminosity of $326 ;mathrm{pb}^{-1}$. The differential cross section has been measured as a function of the azimuthal correlation angle between the scattered lepton and the leading jet. The measurement was performed within the fiducial region, specified in the laboratory frame, given by photon virtuality $10 ;mathrm{GeV}^2 < Q^2 < 350 ;mathrm{GeV}^2$, inelasticity $0.04 < y < 0.7$, outgoing lepton energy $E_e > 10 ;mathrm{GeV}$, lepton polar angle $140^o < heta_e < 180^o$, jet transverse momentum $2.5 ;mathrm{GeV} < p_mathrm{T,jet} < 30 ;mathrm{GeV}$, and jet pseudorapidity $-1.5 < eta_mathrm{jet} < 1.8$. Jets were reconstructed with the $k_mathrm{T}$ algorithm with the radius parameter $R = 1$. The jet carrying the highest $p_mathrm{T,jet}$ within a DIS event was chosen as the leading jet. Perturbative calculations at $O(alpha_{s}^2)$ accuracy and predictions from the ARIADNE color dipole model are compared to the data in order to test the ability of pQCD to describe a wide range of characteristics of the data.