https://doi.org/10.1140/epjc/s10052-009-1198-5
Regular Article - Theoretical Physics
Testing the scale dependence of the scale factor σ eff in double dijet production at the LHC
1
Institut für Theoretische Physik, Philosophenweg 19, 69120, Heidelberg, Germany
2
Department of Physics, Theory Division, CERN, 1211, Genève 23, Switzerland
* e-mail: Urs.Wiedemann@cern.ch
Received:
5
July
2009
Revised:
11
August
2009
Published online:
19
November
2009
The scale factor σ eff is the effective cross section used to characterize the measured rate of inclusive double dijet production in high-energy hadron collisions. It is sensitive to the two-parton distributions in the hadronic projectile. In principle, the scale factor depends on the center of mass energy and on the minimal transverse energy E T,min of the jets contributing to the double dijet cross section. Here, we point out that proton–proton collisions at the LHC will provide for the first time experimental access to these scale dependences in a logarithmically wide, nominally perturbative kinematic range 10≲E T,min ≲100 GeV. This constrains the dependence of two-parton distribution functions on parton momentum fractions and parton localization in impact parameter space. Novel information is to be expected about the transverse growth of hadronic distribution functions in the range of semi-hard Bjorken x (0.001≲x≲0.1) and high resolution Q 2. We discuss to what extent one can disentangle different pictures of the x-evolution of two-parton distributions in the transverse plane by measuring double-hard scattering events at the LHC.
© Springer-Verlag , 2010
