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- W3100357343 abstract "We extend the range of possible applications of MT2 type analyses to decay chains with multiple invisible particles, as well as to asymmetric event topologies with different parent and/or different children particles. We advocate two possible approaches. In the first, we introduce suitably defined 3+1-dimensional analogues of the MT2 variable, which take into account all relevant on-shell kinematic constraints in a given event topology. The second approach utilizes the conventional MT2 variable, but its kinematic endpoint is suitably reinterpreted on a case by case basis, depending on the specific event topology at hand. We provide the general prescription for this reinterpretation, including the formulas relating the measured MT2 endpoint (as a function of the test masses of all the invisible particles) to the underlying physical mass spectrum. We also provide analytical formulas for the shape of the differential distribution of the doubly projected MT2(perp) variable for the ten possible event topologies with one visible particle and up to two invisible particles per decay chain. We illustrate our results with the example of leptonic chargino decays, (chargino to lepton, neutrino and LSP) in supersymmetry." @default.
- W3100357343 created "2020-11-23" @default.
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- W3100357343 date "2013-03-01" @default.
- W3100357343 modified "2023-09-23" @default.
- W3100357343 title "Re-interpreting the Oxbridge stransverse mass variable M T2 in general cases" @default.
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- W3100357343 doi "https://doi.org/10.1007/jhep03(2013)134" @default.
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