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

The ZEUS collaboration
Phys.Lett. B363 (1995) 201-216, 1995

Abstract (data abstract)
DESY-HERA. ZEUS Collaboration. Study of jet production in deep inelastic e p scattering for the Q**2 range 120 to 3600 GeV**2. Data have integrated luminosity of 3.2 pb-1 and are taken with e+ and e- beams. Jets are identified with the JADE algorithm. Data are given as n+1 jet rates where +1 refers to the proton remnant. Values for the strong coupling constant alpha_s at function of Q**2 and extrapolated to the Z0 mass are determined from the 2+1 jet rate.

  • Table 1

    Data from T 1


    2+1 jet rate as a function of ycut the jet algorithm cut-off value. Statistical errors only.

  • Table 2

    Data from T 2


    Measured values of Lambda-QCD in the MS Bar scheme and alpha_s as a function of Q**2. The second systematic uncertainty...

  • Table 3

    Data from T 2


    Strong coupling constant alpha_s extrapolated to the Z0 mass.

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