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**1 - 10**of**10**### Prepared for submission to JHEP Double Parton Scattering Singularity in One-Loop Integrals

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### International Journal of Modern Physics: Conference Series c © The Authors Scale evolution of double parton correlations

"... We review the effect of scale evolution on a number of different correlations in double parton scattering (DPS). The strength of the correlations generally decreases with the scale but at a rate which greatly varies between different types. Through studies of the evolution, an understanding of which ..."

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We review the effect of scale evolution on a number of different correlations in double parton scattering (DPS). The strength of the correlations generally decreases with the scale but at a rate which greatly varies between different types. Through studies of the evolution, an understanding of which correlations can be of experimental relevance in different processes and kinematical regions is obtained.

### Prepared for submission to JHEP Single Perturbative Splitting Diagrams in Double

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### Cavendish-HEP-2012-03 Single and Double Perturbative Splitting Diagrams in Double Parton Scattering

"... DOI: to be assigned We discuss the role of two different types of diagram in the proton-proton double parton scattering (DPS) cross section – single and double perturbative splitting graphs. Using explicit calculations of simple graphs from these classes we show that the treatment of these graphs by ..."

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DOI: to be assigned We discuss the role of two different types of diagram in the proton-proton double parton scattering (DPS) cross section – single and double perturbative splitting graphs. Using explicit calculations of simple graphs from these classes we show that the treatment of these graphs by the ‘double PDF ’ framework for describing the DPS cross section, introduced a number of years ago by Snigirev and collaborators, is unsatisfactory. We suggest that a contribution from single perturbative splitting graphs should be included in the DPS cross section, albeit with a different geometrical prefactor to the contribution from ‘zero perturbative splitting ’ graphs. 1 ‘Double Perturbative Splitting ’ Diagrams in Double Par-ton Scattering We define double parton scattering (DPS) as the process in which two pairs of partons partici-pate in hard interactions in a single proton-proton (p-p) collision. DPS processes can constitute important backgrounds to Higgs and other interesting signals (see e.g. [1]), and can themselves be considered as interesting signal processes, since they reveal information about parton pair correlations in the proton. Making the assumption that the hard processes A and B may be factorised, the cross section for p-p DPS may be written as follows: σD(A,B) ∝ i,j,k,l

### sNN=5.02 TeV with the ATLAS

, 2013

"... Measurement of the azimuthal anisotropy for charged particle production in Pb+Pb collisions at√ sNN=2.76 TeV and in p+Pb collisions at ..."

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Measurement of the azimuthal anisotropy for charged particle production in Pb+Pb collisions at√ sNN=2.76 TeV and in p+Pb collisions at