Spectral clustering for jet reconstruction
Pre-published on:
November 25, 2022
Published on:
June 15, 2023
Abstract
We present a new approach to jet definition alternative to clustering methods, such as the anti-kT scheme, that exploit kinematic data directly. Instead the new method uses kinematic information to represent the particles in a multidimensional space, as in spectral clustering. After confirming its Infra-Red (IR) safety, we compare its performance in analysing gg→H125 GeV→H40 GeVH40 GeV→bˉbbˉb, gg→H500 GeV→H125 GeVH125 GeV→bˉbbˉb and gg,qˉq→tˉt→bˉbW+W−→bˉbjjlνl events from Monte Carlo (MC) samples, specifically, in reconstructing the relevant final states, to that of the anti-kT algorithm. Finally, we show that the results for spectral clustering are obtained without any change in the parameter settings of the algorithm, unlike the anti-kT case, which requires the cone size to be adjusted to the physics process under study.
DOI: https://doi.org/10.22323/1.414.0771
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