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Measurement of Internal Jet Structure in Dijet Production in Deep Inelastic Scattering at HERA

par Adloff, Catherine;Clerbaux, Barbara ;Favart, Laurent ;Marage, Pierre ; [et al.]
Référence Nuclear physics. B, 545, page (3-20)
Publication Publié, 1999

Article révisé par les pairs

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Résumé :

Internal jet structure in dijet production in deep-inelastic scattering is measured with the H1 detector at HERA. Jets with transverse energies ET,Breit > 5 GeV are selected in the Breit frame employing k⊥ and cone jet algorithms. In the kinematic region of squared momentum transfers 10 < Q2 ≲ 120 GeV2 and Bjorken-x values 2 × 10-4 ≲ xBj ≲ 8 × 10-3, jet shapes and subjet multiplicities are measured as a function of a resolution parameter. Distributions of both observables are corrected for detector effects and presented as functions of the transverse jet energy and jet pseudo-rapidity. Dependences of the jet shape and the average number of subjets on the transverse energy and the pseudo-rapidity of the jet are observed. With increasing transverse jet energies and decreasing pseudo-rapidities, i.e. towards the photon hemisphere, the jets are more collimated. QCD models give a fair description of the data. © 1999 Elsevier Science B.V.