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The inclusive jet cross section for proton-proton collisions at acentre-of-mass energy of 7 TeV was measured by the CMS Collaboration at the LHCwith data corresponding to an integrated luminosity of 5.0 inverse femtobarns.The measurement covers a phase space up to 2 TeV in jet transverse momentum and2.5 in absolute jet rapidity. The statistical precision of these data leads tostringent constraints on the parton distribution functions of the proton. Thedata provide important input for the gluon density at high fractions of theproton momentum and for the strong coupling constant at large energy scales.Using predictions from perturbative quantum chromodynamics at next-to-leadingorder, complemented with electroweak corrections, the constraining power ofthese data is investigated and the strong coupling constant at the Z boson massM[Z] is determined to be alpha[S(M[Z])} = 0.1185 +/- 0.0019 (exp) +0.0060-0.0037 (theo), which is in agreement with the world average.

european physical journal. c, particles and fields

Constraints on parton distribution functions and extraction of the  strong coupling constant from the inclusive jet cross section in pp  collisions at sqrt(s) = 7 TeV