Minijets and the Two-Body Parton Correlation
Abstract
A large number of double parton scatterings have been recently measured by CDF. The double parton scattering process measures σeff, a non perturbative quantity related to the hadronic transverse size and with the dimensions of a cross section. The actual value measured by CDF is considerably smaller as compared with the naive expectation, namely the value of the inelastic non diffractive cross section. The small value of σeff may be an effect of the hadron structure in transverse plane. We discuss the problem by taking into account, at all orders, the two-body parton correlations in the many-body parton distributions.
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