Abstract
We present expressions for the kinematic endpoints of 5-body cascade decay chains proceeding through all possible combinations of 2-body and 3-body decays, with one stable invisible particle in the final decay stage. When an invariant mass can be formed in multiple ways by choosing different final state particles from a common vertex, we introduce techniques for finding the sub-leading endpoints for all indistinguishable versions of the invariant mass. In contrast to short decay chains, where sub-leading endpoints are linearly related to the leading endpoints, we find that in 5-body decays, they provide additional independent constraints on the mass spectrum.
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ArXiv ePrint: 1610.08603
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Klimek, M.D. Ordered kinematic endpoints for 5-body cascade decays. J. High Energ. Phys. 2016, 132 (2016). https://doi.org/10.1007/JHEP12(2016)132
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DOI: https://doi.org/10.1007/JHEP12(2016)132