Ziqing Hong, David Toback
We propose a possible way to measure the neutralino mass in Higgs decays to neutralino pairs in a Gauge Mediated Supersymmetry scenario where the neutralino has a long-lifetime (O(ns)). In h^0->{\chi}^{1}_{0}{\chi}^{1}_{0}->(\gamma{G})(\gamma{G}) production and decay in colliders, events can show up in the exclusive photon plus Missing ET final state where one photon arrives at the detector with a delayed time of arrival and the second neutralino will leave the detector. By measuring the slope of the delayed-time distribution with the full CDF Dataset and the EMTiming system we have the possibility of determining the neutalino mass to approximately 25% of itself if the masses and lifetimes are in a favorable combination.
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http://arxiv.org/abs/1210.1884
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