Jet production in deep inelastic scattering for 120 < Q(2) < 3600 GeV2 has been studied using data from an integrated luminosity of 3.2 pb(-1) collected with the ZEUS detector at HERA. Jets are identified with the JADE algorithm. A cut on the angular distribution of parton emission in the gamma(8)-parton centre-of-mass system minimises the experimental and theoretical uncertainties in the determination of the jet rates. The jet rates, when compared to O(alpha(s)(2)) perturbative QCD calculations, allow a precise determination of alpha(s)(Q) in three Q(2)-intervals. The values are consistent with a running of alpha(s)(Q), as expected from QCD. Extrapolating to Q = M(Z0) yields alpha(s)(M(Z0)) = 0.117 +/- 0.005 (stat)(-0.005)(+0.004) (syst(exp)) +/- 0.007 (syst(theory)).

Measurement of Alpha(s) From Jet Rates In Deep-inelastic Scattering At Hera

CIRIO, Roberto;COSTA, Marco;PERONI, Cristiana;SACCHI, Roberto;SOLANO, Ada Maria;
1995-01-01

Abstract

Jet production in deep inelastic scattering for 120 < Q(2) < 3600 GeV2 has been studied using data from an integrated luminosity of 3.2 pb(-1) collected with the ZEUS detector at HERA. Jets are identified with the JADE algorithm. A cut on the angular distribution of parton emission in the gamma(8)-parton centre-of-mass system minimises the experimental and theoretical uncertainties in the determination of the jet rates. The jet rates, when compared to O(alpha(s)(2)) perturbative QCD calculations, allow a precise determination of alpha(s)(Q) in three Q(2)-intervals. The values are consistent with a running of alpha(s)(Q), as expected from QCD. Extrapolating to Q = M(Z0) yields alpha(s)(M(Z0)) = 0.117 +/- 0.005 (stat)(-0.005)(+0.004) (syst(exp)) +/- 0.007 (syst(theory)).
1995
363
201
216
http://dx.doi.org/10.1016/0370-2693(95)01284-W
PROTON SCATTERING; EVENT GENERATOR; CROSS-SECTIONS; MONTE-CARLO; QCD JETS; ZEUS; CALORIMETER; FRAGMENTATION; DEPENDENCE; ENERGIES
M. DERRICK;D. KRAKAUER;S. MAGILL;D. MIKUNAS;B. MUSGRAVE;J. REPOND;R. STANEK;R. L. TALAGA;H. ZHANG;R. AYAD;G. BARI;M. BASILE;L. BELLAGAMBA;D. BOSCHERINI;A. BRUNI;G. BRUNI;P. BRUNI;G. C. ROMEO;G. CASTELLINI;M. CHIARINI;L. CIFARELLI;F. CINDOLO;A. CONTIN;M. CORRADI;I. GIALAS;P. GIUSTI;G. IACOBUCCI;G. LAURENTI;G. LEVI;A. MARGOTTI;T. MASSAM;R. NANIA;C. NEMOZ;F. PALMONARI;A. POLINI;G. SARTORELLI;R. TIMELLINI;Y. Z. GARCIA;A. ZICHICHI;A. BARGENDE;A. BORNHEIM;J. CRITTENDEN;K. DESCH;B. DIEKMANN;T. DOEKER;M. ECKERT;L. FELD;A. FREY;M. GEERTS;M. GROTHE;H. HARTMANN;K. HEINLOTH;E. HILGER;H. P. JAKOB;U. F. KATZ;S. MENGEL;J. MOLLEN;E. PAUL;M. PFEIFFER;C. REMBSER;D. SCHRAMM;J. STAMM;R. WEDEMEYER;S. CAMPBELLROBSON;A. CASSIDY;W. N. COTTINGHAM;N. DYCE;B. FOSTER;S. GEORGE;M. E. HAYES;G. P. HEATH;H. F. HEATH;C. J. S.;J. A. OMARA;D. PICCIONI;D. G. ROFF;R. J. TAPPER;R. YOSHIDA;R. R. RAU;M. ARNEODO;M. CAPUA;A. GARFAGNINI;L. IANNOTTI;M. SCHIOPPA;G. SUSINNO;A. BERNSTEIN;A. CALDWELL;N. CARTIGLIA;J. A. PARSONS;S. 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