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We present a detailed study of the collider observable m T 2 applied for pair-produced superparticles decaying to visible particles and a pair of invisible lightest supersym-metric particles (LSPs). Analytic expressions of the maximum of m T 2 over all events (m max T 2) are derived. It is noticed that if the decay product of each superparticle involves(More)
We investigate the possibility to measure the top quark mass using the collider variable m T 2 at the LHC experiment. Monte Carlo studies of m T 2 are performed with the events corresponding to the dilepton decays of t ¯ t produced at the LHC with 10 f b −1 integrated luminosity. Our analysis suggests that the top quark mass can be determined by the m T 2(More)
We discuss nonstandard interpretations of the 750 GeV diphoton excess recently reported by the ATLAS and CMS Collaborations which do not involve a new, relatively broad resonance with a mass near 750 GeV. Instead, we consider the sequential cascade decay of a much heavier, possibly quite narrow, resonance into two photons along with one or more additional(More)
We introduce a new observable, "gluino m_{T2}," which is an application of the Cambridge m_{T2} variable to the process where gluinos are pair produced in a proton-proton collision and each gluino subsequently decays into two quarks and one lightest supersymmetric particle, i.e., g[over ]g[over ]-->qqchi[over ]_{1};{0}qqchi[over ]_{1};{0}. We show that the(More)
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