1202.5034 (Aneesh V. Manohar et al.)

What is Double Parton Scattering?    [PDF]

Aneesh V. Manohar, Wouter J. Waalewijn

Processes such as double Drell-Yan and same-sign WW production have
contributions from double parton scattering, which are not well-defined because
of a delta(z_\perp=0) singularity that is generated by QCD evolution. We study
the single and double parton contributions to these processes, and show how to
handle the singularity using factorization and operator renormalization.

View original: http://arxiv.org/abs/1202.5034