Jet production in charged current deep inelastic e ⁺ p scatteringat HERA

Abstract.

The production rates and substructure of jets have been studied in charged current deep inelastic e ⁺ p scattering for Q ² > 200 GeV² with the ZEUS detector at HERA using an integrated luminosity of 110.5 pb^-1. Inclusive jet cross sections are presented for jets with transverse energies $E_T^{\rm jet} > 14$ GeV and pseudorapidities in the range $-1 < \eta^{\rm jet} < 2$. Dijet cross sections are presented for events with a jet having $E_T^{\rm jet} > 14$ GeV and a second jet having $E_T^{\rm jet} > 5$ GeV. Measurements of the mean subjet multiplicity, $\langle n_{\rm sbj}\rangle$, of the inclusive jet sample are presented. Predictions based on parton-shower Monte Carlo models and next-to-leading-order QCD calculations are compared to the measurements. The value of $\alpha_s(M_Z)$, determined from $\langle n_{\rm sbj}\rangle$ at $y_{\rm cut} = 10^{-2}$ for jets with $25 < E_T^{\rm jet} < 119$ GeV, is $\alpha_s(M_Z) = 0.1202 \pm 0.0052 ({\rm stat.}) ^{ + 0.0060}_{-0.0019} ({\rm syst.}) ^{ + 0.0065}_{-0.0053} ({\rm th.})$. The mean subjet multiplicity as a function of Q ² is found to be consistent with that measured in NC DIS.