The authors define a generalised-k_t jet algorithm family for DIS in the Breit frame, extending the prior p=0 case, and test its use for struck-quark jet identification and non-perturbative effects.
Inclusive jet cross sections in the Breit frame in neutral current deep inelastic scattering at HERA and determination of alpha_s
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abstract
Inclusive jet differential cross sections have been measured in neutral current deep inelastic e+p scattering for boson virtualities Q**2>125 GeV**2. The data were taken using the ZEUS detector at HERA and correspond to an integrated luminosity of 38.6 pb-1. Jets were identified in the Breit frame using the longitudinally invariant K_T cluster algorithm. Measurements of differential inclusive jet cross sections are presented as functions of jet transverse energy (E_T,jet), jet pseudorapidity and Q**2, for jets with E_T,jet>8 GeV. Next-to-leading-order QCD calculations agree well with the measurements both at high Q**2 and high E_T,jet. The value of alpha_s(M_Z), determined from an analysis of dsigma/dQ**2 for Q**2>500 GeV**2, is alpha_s(M_Z) = 0.1212 +/- 0.0017 (stat.) +0.0023 / -0.0031 (syst.) +0.0028 / -0.0027 (th.).
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hep-ph 1years
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A generalised-$k_t$ jet algorithm for Deep Inelastic Scattering
The authors define a generalised-k_t jet algorithm family for DIS in the Breit frame, extending the prior p=0 case, and test its use for struck-quark jet identification and non-perturbative effects.