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, View the MathML sourcemtpole, or the strong coupling constant, αSαS. With the parton distribution function set NNPDF2.3, a pole mass of View the MathML source176.7−3.4+3.8 GeV is obtained when constraining αSαS at the scale of the Z boson mass, mZmZ, to the current world average. Alternatively, by constraining View the MathML sourcemtpole to the latest average from direct mass measurements, a value of View the MathML sourceαS(mZ)=0.1151−0.0032+0.0033 is extracted. This is the first determination of αSαS using events from top-quark production.

S. Chatrchyan, V. Khachatryan, A. M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, et al. (2014). Determination of the top-quark pole mass and strong coupling constant from the production cross section in pp collisions at sqrt(s) = 7 TeV. PHYSICS LETTERS. SECTION B, 728, 496-517 [10.1016/j.physletb.2013.12.009].

Determination of the top-quark pole mass and strong coupling constant from the production cross section in pp collisions at sqrt(s) = 7 TeV

BONACORSI, DANIELE;BRAIBANT, SYLVIE;BRIGLIADORI, LUCA;CAMPANINI, RENATO;CAPILUPPI, PAOLO;CASTRO, ANDREA;CODISPOTI, GIUSEPPE;CUFFIANI, MARCO;FANFANI, ALESSANDRA;FASANELLA, DANIELE;GUIDUCCI, LUIGI;MENEGHELLI, MARCO;PRIMAVERA, FEDERICA;ROVELLI, TIZIANO;SIROLI, GIAN PIERO;TOSI, NICOLÒ;
2014

Abstract

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, View the MathML sourcemtpole, or the strong coupling constant, αSαS. With the parton distribution function set NNPDF2.3, a pole mass of View the MathML source176.7−3.4+3.8 GeV is obtained when constraining αSαS at the scale of the Z boson mass, mZmZ, to the current world average. Alternatively, by constraining View the MathML sourcemtpole to the latest average from direct mass measurements, a value of View the MathML sourceαS(mZ)=0.1151−0.0032+0.0033 is extracted. This is the first determination of αSαS using events from top-quark production.
2014
S. Chatrchyan, V. Khachatryan, A. M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, et al. (2014). Determination of the top-quark pole mass and strong coupling constant from the production cross section in pp collisions at sqrt(s) = 7 TeV. PHYSICS LETTERS. SECTION B, 728, 496-517 [10.1016/j.physletb.2013.12.009].
S. Chatrchyan;V. Khachatryan;A. M. Sirunyan;A. Tumasyan;W. Adam;T. Bergauer;M. Dragicevic;J. Erö;C. Fabjan;M. Friedl;R. Frühwirth;V. M. Ghete;N. Hörma...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/234876
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