Pileup Removal Algorithms

CMS Physics Analysis Summaries
Report number	CMS-PAS-JME-14-001
Title	Pileup Removal Algorithms
Corporate author(s)	CMS Collaboration
Collaboration	CMS Collaboration
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; CMS
Abstract	One of the main challenges of the upcoming LHC run will be the increase of instantaneous luminosity, which will result in a large number of additional proton-proton collisions in each event (pileup). In such a high pileup environment, the accurate reconstruction of jet properties and shapes will be more and more demanding. In this note, the performances of various advanced pileup mitigation tools such as charged hadron subtraction, grooming techniques, jet cleansing and per particle pileup approaches are studied. The focus is on preparation for LHC Run II for which we expect up to 40 additional pileup events on average and includes comparisons to LHC Run I data which has typically 20 additional pileup events on average.
Other source	Inspire
Email contact: cms-pog-conveners-jetmet@cern.ch Fulltext in PDF Figure_015 Figure_001-b Figure_004-b Figure_001-a Figure_009-e Figure_011 Figure_006-b Figure_009-a Figure_009-c Figure_019 Figure_018 Figure_002 Figure_003 Figure_016-a Figure_016-b Figure_005 Figure_008-f Figure_008-e Figure_009-f Figure_008-d Figure_008-a Figure_008-b Figure_008-c Figure_010-c Figure_009-b Figure_009-d Figure_010-a Figure_010-b Figure_004-a Figure_014-b Figure_014-a Figure_013-b Figure_022-b Figure_013-a Figure_012-c Figure_014-d Figure_017-a Figure_017-b Figure_014-c Figure_006-a Figure_012-b Figure_012-a Figure_020-b Figure_007-a Figure_007-b Figure_020-a Figure_022-a Figure_023-b Figure_023-a Figure_021-a Figure_021-b Additional information for the analysis (restricted access)