Title of article :
Measurement of subjet multiplicities in neutral current deep inelastic scattering at HERA and determination of αs
Author/Authors :
ZEUS Collaboration، نويسنده , , Valeri S. Chekanov، نويسنده , , D. Krakauer، نويسنده , , J.H. Loizides، نويسنده , , S. Magill، نويسنده , , B. Musgrave، نويسنده , , J. Repond، نويسنده , , R. Yoshida، نويسنده , , M.C.K. Mattingly، نويسنده , , P. Antonioli، نويسنده , , G. Bari، نويسنده , , M. Basile، نويسنده , , L. Bellagamba، نويسنده , , D. Boscherini، نويسنده , , C. B. Vicentini and A. Bruni، نويسنده , , G. Bruni، نويسنده , , G. Cara Romeo، نويسنده , , L. Cifarelli، نويسنده , , F. Cindolo، نويسنده , , A. Contin، نويسنده , , et al.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2003
Pages :
18
From page :
41
To page :
58
Abstract :
The subjet multiplicity has been measured in neutral current e+p interactions at Q2>125 GeV2 with the ZEUS detector at HERA using an integrated luminosity of 38.6 pb−1. Jets were identified in the laboratory frame using the longitudinally invariant kT cluster algorithm. The number of jet-like substructures within jets, known as the subjet multiplicity, is defined as the number of clusters resolved in a jet by reapplying the jet algorithm at a smaller resolution scale ycut. Measurements of the mean subjet multiplicity, 〈nsbj〉, for jets with transverse energies ET,jet>15 GeV are presented. Next-to-leading-order perturbative QCD calculations describe the measurements well. The value of αs(MZ), determined from 〈nsbj〉 at ycut=10−2 for jets with 25
Journal title :
PHYSICS LETTERS B
Serial Year :
2003
Journal title :
PHYSICS LETTERS B
Record number :
916721
Link To Document :
