Searches for new physics using the t(t)over-bar invariant mass distribution in pp collisions at root s=8 TeV

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doi:10.1103/PhysRevLett.111.211804

Searches for anomalous top quark-antiquark production are presented, based on pp collisions at root s = 8 TeV. The data, corresponding to an integrated luminosity of 19.7 fb(-1), were collected with the CMS detector at the LHC. The observed t (t) over bar invariant mass spectrum is found to be compatible with the standard model prediction. Limits on the production cross section times branching fraction probe, for the first time, a region of parameter space for certain models of new physics not yet constrained by precision measurements.

Searches for new physics using the t(t)over-bar invariant mass distribution in pp collisions at root s=8 TeV / Chatrchyan, S., Khachatryan, V., Sirunyan, A.m., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Eroe, J., Fabjan, C., Friedl, M., Fruhwirth, R., Ghete, V.m., Hormann, N., Hrubec, J., Jeitler, M., Kiesenhofer, W., Knunz, V., Krammer, M., Kratschmer, I., Liko, D., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 111:21(2013). [10.1103/PhysRevLett.111.211804]