AI Article Synopsis
- - The study examines unusual production of top quark-antiquark pairs from proton-proton collisions at a high energy level (√s=8 TeV), utilizing data from the CMS detector at the LHC.
- - A total of 19.7 fb(-1) of data was analyzed, and the results show that the observed mass spectrum aligns with predictions made by the standard model of particle physics.
- - For the first time, limitations on production cross sections and branching fractions are set, exploring specific new physics models that have not been addressed by previous precise measurements.
Article Abstract
Searches for anomalous top quark-antiquark production are presented, based on pp collisions at √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 tt¯ 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.
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| http://dx.doi.org/10.1103/PhysRevLett.111.211804 | DOI Listing |
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