Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2012-03-09
Physics
High Energy Physics
High Energy Physics - Phenomenology
Contributed to the proceedings of the Workshop on Multi-Parton Interactions at the LHC, 21-25 November 2011, DESY, Hamburg
Scientific paper
We show that the "ridge" phenomenon in the two-particle angular correlation function, as observed by the CMS experiment, can be reproduced by implementing an impact parameter dependent azimuthal correlation of the scattering planes of individual partonic interactions. Such an approach is motivated by the observation that even for moderate impact parameters a substantial number of partonic interactions may be produced, while at the same time the protons are sufficiently far apart to create a preferential direction in azimuth. A re-tune of the Pythia6 Z2 tune based on underlying event and minimum bias distributions measured at the LHC shows that a better description of data can be obtained with this approach and that some tension existing between underlying event and minimum bias distributions can be removed. We show that, even though the CMS result on the angular correlation function itself is not used in the re-tune, we can predict the appearance of long-range, near-side angular correlations in proton-proton collisions.
Alderweireldt Sara
Mechelen Pierre Van
No associations
LandOfFree
Obtaining the CMS Ridge effect with Multiparton Interactions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Obtaining the CMS Ridge effect with Multiparton Interactions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Obtaining the CMS Ridge effect with Multiparton Interactions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-302165