Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-09-26
JHEP 0904:056,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
Small revision in spin measurements; minor changes; conclusion unchanged; version to appear in JHEP
Scientific paper
10.1088/1126-6708/2009/04/056
We perform a model-independent study for top-antitop and top-top resonances in the dilepton channel at the Large Hadtron Collider. In this channel, we can solve the kinematic system to obtain the momenta of all particles including the two neutrinos, and hence the resonance mass and spin. For discovering top-antitop resonances, the dilepton channel is competitive to the semileptonic channel because of the good resolution of lepton momentum measurement and small standard model backgrounds. Moreover, the charges of the two leptons can be identified, which makes the dilepton channel advantageous for discovering top-top resonances and for distinguishing resonance spins. We discuss and provide resolutions for difficulties associated with heavy resonances and highly boosted top quarks.
Bai Yang
Han Zhenyu
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