Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 4, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP04(2012)039
Keywords
Jets; Hadronic Colliders
Categories
Funding
- US Department of Energy [DE-AC02-76SF00515]
- Stanford Institute for Theoretical Physics
- U.S. National Science Foundation [NSF-PHY-0969510]
- LHC Theory Initiative, Jonathan Bagger, PI
- Division Of Physics
- Direct For Mathematical & Physical Scien [969510] Funding Source: National Science Foundation
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We introduce a jet shape observable defined for an ensemble of jets in terms of two-particle angular correlations and a resolution parameter R. This quantity is infrared and collinear safe and can be interpreted as a scaling exponent for the angular distribution of mass inside the jet. For small R it is close to the value 2 as a consequence of the approximately scale invariant QCD dynamics. For large R it is sensitive to non-perturbative effects. We describe the use of this correlation function for tests of QCD, for studying underlying event and pile-up effects, and for tuning Monte Carlo event generators.
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