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Correlations in double parton distributions: effects of evolution · Around

2014

Correlations in double parton distributions: effects of evolution

Diehl, Markus, Kasemets, Tomas, Keane, Shane

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We numerically investigate the impact of scale evolution on double parton distributions, which are needed to compute multiple hard scattering processes.

Assuming correlations between longitudinal and transverse variables or between the parton spins to be present at a low scale, we study how they are affected by evolution to higher scales, i.e.
by repeated parton emission.
We find that generically evolution tends to wash out correlations, but with a speed that may be slow or fast depending on kinematics and on the type of correlation.

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