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Study of tt-Photon Events with the CMS-detector Bad Honnef 27. August 2007. Thomas Hermanns III. Physikalisches Institut B. tt-Photon Events at the LHC. Cross section for tt-pair production at s= 14 TeV: 830 pb (NLO) About 1 tt-pair per second (L=10 33 cm -2 s -1 )
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