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

The 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 ${\rm\frac{d^2\sigma_{3-jet}}{dQ^2d\langle P_T \rangle}/\frac{d^2\sigma_{2-jet}}{dQ^2d\langle P_T \rangle}}$.