A data-driven method of pile-up correction for the substructure of massive jets

Details A data-driven method of pile-up correction for the substructure of massive jets A data-driven method of pile-up correction for the substructure of massive jets

2011-01-15

arxiv.org/abs/1101.3002v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages and 3 figures, minor corrections

Scientific paper

We describe a method to measure and subtract the incoherent component of energy flow arising from multiple interactions from jet shape/substructure observables of ultra-massive jets. The amount subtracted is a function of the jet shape variable of interest and not a universal property. Such a correction is expected to significantly reduce any bias in the corresponding distributions generated by the presence of multiple interactions, and to improve measurement resolution. Since in our method the correction is obtained from the data, it is not subject to uncertainties coming from the use of theoretical calculations and/or Monte Carlo event generators. We derive our correction method for the jet mass, angularity and planar flow. We find these corrections to be in good agreement with data on massive jets observed by the CDF collaboration. Finally, we comment on the linkage with the concept of jet area and jet mass area.

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