A New Method for Resolving Combinatorial Ambiguities at Hadron Colliders

Details A New Method for Resolving Combinatorial Ambiguities at Hadron Colliders A New Method for Resolving Combinatorial Ambiguities at Hadron Colliders

2010-09-14

arxiv.org/abs/1009.2751v2

Phys.Lett.B700:126-132,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, 3 figures; v2, introduction, discussion, and conclusions edited for clarity, figures condensed, published version

Scientific paper

10.1016/j.physletb.2011.04.068

We present a new method for resolving combinatorial ambiguities that arise in multi-particle decay chains at hadron colliders where the assignment of visible particles to the different decay chains has ambiguities. Our method, based on selection cuts favoring high transverse momentum and low invariant mass pairings, is shown to be significantly superior to the more traditional hemisphere method for a large class of decay chains, producing an increase in signal retention of up to a factor of 2. This new method can thus greatly reduce the combinatorial ambiguities of decay chain assignments.

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