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© 2013 The Authors. Published by Elsevier B.V

Abstract or Description

The inclusive cross section for top-quark pair production measured by the CMS experiment in proton–proton collisions at a center-of-mass energy of 7 TeV is compared to the QCD prediction at next-to-next-to-leading order with various parton distribution functions to determine the top-quark pole mass, , or the strong coupling constant,αS. With the parton distribution function set NNPDF2.3, a pole mass of is obtained when constraining αS at the scale of the Z boson mass, mZ, to the current world average. Alternatively, by constraining to the latest average from direct mass measurements, a value of is extracted. This is the first determination of αS using events from top-quark production.


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Published In

Physics Letters B, 728, 496-517.