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Jet Production in ep Collisions at Low Q**2 and Determination of alpha(s)

The H1 collaboration
Eur.Phys.J. C67 (2010) 1-24, 2010

Abstract (data abstract)
DESY-HERA. The production of jets is studied in deep-inelastic e+p scattering at low negative four momentum transfer squared 5<$Q^2$<100 GeV$^2$ and at inelasticity 0.2<y<0.7 using data recorded by the H1 detector at HERA in the years 1999 and 2000, corresponding to an integrated luminosity of 43.5 pb$^{-1}$. Inclusive jet, 2-jet and 3-jet cross sections as well as the ratio of 3-jet to 2-jet cross sections are measured as a function of $Q^2$ and jet transverse momentum. The 2-jet cross section is also measured as a function of the proton momentum fraction $\xi$. The measurements are well described by perturbative quantum chromodynamics at next-to-leading order corrected for hadronisation effects and are subsequently used to extract the strong coupling $\alpha_s$.

  • Table 1

    Data from Table 3

    10.17182/hepdata.31170.v1/t1

    Inclusive Jet Cross Section ${\rm\frac{d\sigma_{jet}}{dQ^2}}$.

  • Table 2

    Data from Table 3

    10.17182/hepdata.31170.v1/t2

    2-Jet Cross Section ${\rm\frac{d\sigma_{2-jet}}{dQ^2}}$.

  • Table 3

    Data from Table 3

    10.17182/hepdata.31170.v1/t3

    3-Jet Cross Section ${\rm\frac{d\sigma_{3-jet}}{dQ^2}}$.

  • Table 4

    Data from Table 4

    10.17182/hepdata.31170.v1/t4

    Inclusive Jet Cross Section ${\rm\frac{d\sigma_{jet}}{dP_T}}$.

  • Table 5

    Data from Table 4

    10.17182/hepdata.31170.v1/t5

    2-Jet Cross Section ${\rm\frac{d\sigma_{2-jet}}{d\langle P_T \rangle}}$.

  • Table 6

    Data from Table 4

    10.17182/hepdata.31170.v1/t6

    3-Jet Cross Section ${\rm\frac{d\sigma_{3-jet}}{d\langle P_T \rangle}}$.

  • Table 7

    Data from Table 5

    10.17182/hepdata.31170.v1/t7

    Inclusive Jet Cross Section ${\rm\frac{d^2\sigma_{jet}}{dQ^2dP_T}}$.

  • Table 8

    Data from Table 6

    10.17182/hepdata.31170.v1/t8

    2-Jet Cross Section ${\rm\frac{d^2\sigma_{2-jet}}{dQ^2d\langle P_T \rangle}}$.

  • Table 9

    Data from Table 7

    10.17182/hepdata.31170.v1/t9

    2-Jet Cross Section ${\rm\frac{d^2\sigma_{2-jet}}{dQ^2d\xi}}$.

  • Table 10

    Data from Table 8

    10.17182/hepdata.31170.v1/t10

    3-Jet Cross Section ${\rm\frac{d^2\sigma_{3-jet}}{dQ^2d\langle P_T \rangle}}$.

  • Table 11

    Data from Table 9

    10.17182/hepdata.31170.v1/t11

    3-Jet to 2-Jet Cross Sections Ratio ${\rm\frac{d\sigma_{3-jet}}{dQ^2}/\frac{d\sigma_{2-jet}}{dQ^2}}$.

  • Table 12

    Data from Table 9

    10.17182/hepdata.31170.v1/t12

    3-Jet to 2-Jet Cross Sections Ratio ${\rm\frac{d\sigma_{3-jet}}{d\langle P_T \rangle}/\frac{d\sigma_{2-jet}}{d\langle P_T \rangle}}$.

  • Table 13

    Data from Table 9

    10.17182/hepdata.31170.v1/t13

    3-Jet to 2-Jet Cross Sections Ratio ${\rm\frac{d^2\sigma_{3-jet}}{dQ^2d\langle P_T \rangle}/\frac{d^2\sigma_{2-jet}}{dQ^2d\langle P_T \rangle}}$.

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