Search for resonant top quark plus jet production in tt̄+jets events with the ATLAS detector in pp collisions at √s=7TeV

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Abstract

This paper presents a search for a new heavy particle produced in association with a top or antitop quark. Two models in which the new heavy particle is a color singlet or a color triplet are considered, decaying, respectively, to t̄q or tq, leading to a resonance within the tt̄+jets signature. The full 2011 ATLAS pp collision data set from the LHC (4.7fb -1) is used to search for tt̄ events produced in association with jets, in which one of the W bosons from the top quarks decays leptonically and the other decays hadronically. The data are consistent with the Standard Model expectation, and a new particle with mass below 430 Gev for both W ′ boson and color triplet models is excluded at 95% confidence level, assuming unit right-handed coupling. © 2012 CERN.

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Aad, G., Abajyan, T., Abbott, B., Abdallah, J., Abdel Khalek, S., Abdelalim, A. A., … Zwalinski, L. (2012). Search for resonant top quark plus jet production in tt̄+jets events with the ATLAS detector in pp collisions at √s=7TeV. Physical Review D - Particles, Fields, Gravitation and Cosmology, 86(9). https://doi.org/10.1103/PhysRevD.86.091103

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