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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Rubin, M. Non-global logarithms in filtered jet algorithms. J. High Energ. Phys. 2010, 5 (2010). https://doi.org/10.1007/JHEP05(2010)005
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DOI: https://doi.org/10.1007/JHEP05(2010)005