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Web Page
Public Note arXiv:1008.0344v1 Nucl. Instrum. Methods Phys. A 622, 698 (2010)
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| Contact(s) |
F. Canelli, M. D'Onofrio, H.J. Frisch, S. Mrenna, A.A. Paramonov
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| Abstract |
We evaluate the impact of theoretical uncertainties on the measured energy of hadronic jets. The analysis is performed using events with a Z boson and a single jet observed in pp collisions at ps = 1.96 TeV in 4.62 fb-1 of data from the Collider Detector at Fermilab (CDF). The jets are measured using the CDF non-compensating sampling calorimeters which have a non-linear response to single particles. The transverse momenta (pT) of the jet and the boson should balance each other due to momentum conservation in the plane transverse to the direction of the p and p beams. We evaluate the dependence of the measured pT-balance on theoretical uncertainties associated with initial and final state radiation, choice of renormalization and factorization scales, parton distribution functions, jet-parton matching, calculations of matrix elements, and parton showering. We find that the uncertainty caused by parton showering at large angles is largest. We conclude that special actions have to be taken to achieve an uncertainty on the jet energy scale of even 3% in an experiment with a non-linear hadronic calorimeter such as those at CDF and at the LHC, a possible limitation on discovery potential in signatures containing jets.
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| Comments |
Last Update: Feb 2010 Dataset: 4.6 fb-1
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