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Edge Detecting New Physics the Voronoi Way

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arxiv 1506.04141 v1 pith:PFRZC3EY submitted 2015-06-12 hep-ph hep-ex

Edge Detecting New Physics the Voronoi Way

classification hep-ph hep-ex
keywords voronoidataphysicsadditionedgeskinematictessellationsalgorithms
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We point out that interesting features in high energy physics data can be determined from properties of Voronoi tessellations of the relevant phase space. For illustration, we focus on the detection of kinematic "edges" in two dimensions, which may signal physics beyond the standard model. After deriving some useful geometric results for Voronoi tessellations on perfect grids, we propose several algorithms for tagging the Voronoi cells in the vicinity of kinematic edges in real data. We show that the efficiency is improved by the addition of a few Voronoi relaxation steps via Lloyd's method. By preserving the maximum spatial resolution of the data, Voronoi methods can be a valuable addition to the data analysis toolkit at the LHC.

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