Partonic cross-sections

Here the coefficients are functions of the kinematic variables and the factorization scale. Different hard processes will contribute with different leading powers k to the partonic cross section. 

The partonic short-distance cross section aij can be computed in pQCD as... 

The main production mechanism and its subsequent decay say into can be visualized in the quark-parton model as in Fig. 5.3. Let /s be the CM energy of the pp collision. The cross-section s) to produce a of invariant mass /s will depend upon the elementary cross-section for ud —> multiplied by the flux of u and d... 

Fig. 5.4. Calculated parton model cross-sections for the production of W bosons in pp and pp collisions. Solid and dashed lines correspond to different assumed parton distribution functions. (Prom Quigg, 1977.)...

Neutrino cross-sections in the quark—parton model for... 

In Chapters 15 and 16 we developed the theory of deep inelastic scattering from a very general point of view, using the general structure of the cross-section in terms of the three scaling functions Fj x). FVom their experimental behaviour we were led to the quark-parton picture in which a virtual photon, or emitted at the lepton vertex interacts with a quark or antiquark in the target hadron. At the level of the simple... 

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