Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-04-17
JHEP 0904:098,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
Typos fixed. Published in JHEP
Scientific paper
10.1088/1126-6708/2009/04/098
The expected rate for Multiple Parton Interactions (MPI) at the LHC is large. This requires an estimate of their impact on all measurement foreseen at the LHC while opening unprecendented opportunities for a detailed study of these phenomena. In this paper we examine the MPI background to top-antitop production, in the semileptonic channel, in the early phase of data taking when the full power of $b$--tagging will not be available. The MPI background turns out to be small but non negligible, of the order of 20% of the background provided by W+4j production through a Single Parton Interaction. We then analyze the possibility of studying Multiple Parton Interactions in the W+4j channel, a far more complicated setting than the reactions examined at lower energies. The MPI contribution turns out to be dominated by final states with two energetic jets which balance in transverse momentum, and it appears possible, thanks to the good angular resolution of ATLAS and CMS, to separate the Multiple Parton Interactions contribution from Single Parton Interaction processes. The large cross section for two jet production suggests that also Triple Parton Interactions (TPI) could provide a non negligible contribution. Our preliminary analysis suggests that it might be indeed possible to investigate TPI at the LHC.
No associations
LandOfFree
Multiple Parton Interactions, top--antitop and W+4j production at the LHC 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 Multiple Parton Interactions, top--antitop and W+4j production at the LHC, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiple Parton Interactions, top--antitop and W+4j production at the LHC will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-141210