Measurement of alpha-s from jet rates in deep inelastic scattering at HERA - INSPIRE

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Measurement of alpha-s from jet rates in deep inelastic scattering at HERA

ZEUS

Collaboration

Oct, 1995

16 pages

Published in:

Phys.Lett.B 363 (1995) 201-216

e-Print:

hep-ex/9510001 [hep-ex]

DOI:

10.1016/0370-2693(95)01284-W

Report number:

DESY-95-182

Experiments:

DESY-HERA-ZEUS

View in:

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Abstract:

Jet production in deep inelastic scattering for

120<Q~2<3600

GeV

~2

has been studied using data from an integrated luminosity of 3.2pb

~{-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~*

-parton centre-of-mass system minimises the experimental and theoretical uncertainties in the determination of the jet rates. The jet rates, when compared to

{\cal 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_{Z~0}

yields

\alpha_{s}(M_{Z~0}) = 0.117\pm0.005(stat)~{+0.004}_{-0.005}(syst_{exp}) {\pm0.007}(syst_{theory})$.

Note:

22 pages, latex, 4 figures appended as uuencoded file Report-no: DESY 95-182

electron p: colliding beams
colliding beams: electron p
positron p: colliding beams
colliding beams: positron p
electron p: deep inelastic scattering
deep inelastic scattering: electron p
positron p: deep inelastic scattering
deep inelastic scattering: positron p
jet: electroproduction
electroproduction: jet

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