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arXiv · 1002.4557

Non-Global Logarithms in Filtered Jet Algorithms

Mathieu Rubin
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Abstract

We analytically and numerically study the effect of perturbative gluons emission on the "Filtering analysis", which is part of a subjet analysis procedure proposed two years ago to possibly identify a low-mass Higgs boson decaying into b\bar{b} at the LHC. This leads us to examine the non-global structure of the resulting perturbative series in the leading single-log large-N_c approximation, including all-orders numerical results, simple analytical approximations to them and comments on the structure of their series expansion. We then use these results to semi-analytically optimize the parameters of the Filtering analysis so as to suppress as much as possible the effect of underlying event and pile-up on the Higgs mass peak reconstruction while keeping the major part of the perturbative radiation from the b\bar{b} dipole.

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Mathieu Rubin. 2010-05-10. Non-Global Logarithms in Filtered Jet Algorithms. https://doi.org/10.1007/jhep05(2010)005

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