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 a-re presented as functions of jet transverse energy (E(T.jet)(B)), jet pseudorapidity and Q(2), for jets with E(T.jet)(B) > 8 GeV. Next-to-leading-order QCD calculations agree well with the measurements both at high Q(2) and high E(T.jet)(B). The value of alpha(s) (M(Z)), determined from an analysis of dsigma/dQ(2) for Q(2) > GeV(2), is alphas (M(Z)) = 0.1212 +/- 0.0017(stat.)(-0.0031)(+0.0023)(syst.)(-0.0027)(+0.0028)(th.). (C) 2002 Elsevier Science B.V. All rights reserved.
Inclusive jet cross sections in the Breit frame in neutral current deep inelastic scattering at HERA and determination of alpha(s)
CIRIO, Roberto;COSTA, Marco;MONACO, Vincenzo;PERONI, Cristiana;SACCHI, Roberto;SOLANO, Ada Maria;
2002-01-01
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 a-re presented as functions of jet transverse energy (E(T.jet)(B)), jet pseudorapidity and Q(2), for jets with E(T.jet)(B) > 8 GeV. Next-to-leading-order QCD calculations agree well with the measurements both at high Q(2) and high E(T.jet)(B). The value of alpha(s) (M(Z)), determined from an analysis of dsigma/dQ(2) for Q(2) > GeV(2), is alphas (M(Z)) = 0.1212 +/- 0.0017(stat.)(-0.0031)(+0.0023)(syst.)(-0.0027)(+0.0028)(th.). (C) 2002 Elsevier Science B.V. All rights reserved.File | Dimensione | Formato | |
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