Fully hadronic t cross section with the ATLAS detector

5th International Workshop on Top Quark Physics

Coccaro, Andrea^1

Department of Physics, University of Washington, Seattle WA, United States^1

关键词: ATLAS detectors;    ATLAS experiment;    Centre-of-mass energies;    Final state;    Hadronic decays;    Production cross section;    Proton proton collisions;    The standard model;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/452/1/012045/pdf
DOI  :  10.1088/1742-6596/452/1/012045

来源: IOP

【 摘 要 】

A measurement of the t production cross section in the all-hadronic decay mode is presented using 4.7 fb-1of proton-proton collisions at a centre of mass energy of 7 TeV collected by the ATLAS experiment in 2011. Events are selected using a multi-jet trigger. Kinematic and b-tagging requirements are then applied to identify t event candidates. A kinematic fit reconstructs the event topology of the final state extracting the top-quark mass which is then used to measure the production cross section with an unbinned likelihood fit. The result is found in good agreement with the Standard Model prediction for a top-quark mass of 172.5 GeV.