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Revisiting combinatorial ambiguities at Hadron Colliders with M T2

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Abstract

We present a method to resolve combinatorial issues in multi-particle final states at hadron colliders. The use of kinematic variables such as M T2 and invariant mass significantly reduces combinatorial ambiguities in the signal, but at a cost of losing statistics. We illustrate this idea with gluino pair production leading to 4 jets \( {\not{E}_T} \) in the final state as well as \( t\bar{t} \) production in the dilepton channel. Compared to results in recent studies, our method provides greater efficiency with similar purity.

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Authors and Affiliations

  1. Department of Physics and Astronomy, University of Kansas, 1251 Wescoe Hall Dr, Lawrence, KS, 66045, U.S.A.

    Philip Baringer, Kyoungchul Kong, Mathew McCaskey & Daniel Noonan

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  1. Philip Baringer
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  2. Kyoungchul Kong
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  3. Mathew McCaskey
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  4. Daniel Noonan
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Correspondence to Mathew McCaskey.

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ArXiv ePrint: 1109.1563

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Baringer, P., Kong, K., McCaskey, M. et al. Revisiting combinatorial ambiguities at Hadron Colliders with M T2 . J. High Energ. Phys. 2011, 101 (2011). https://doi.org/10.1007/JHEP10(2011)101

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  • DOI: https://doi.org/10.1007/JHEP10(2011)101

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