Implications of CTEQ global analysis for collider observables

By Pavel M. Nadolsky, Hung-Liang Lai, Qing-Hong Cao, J. Huston, J. Pumplin, D. Stump, W. Tung, C. Yuan. 2008

1,575 citations recorded by the source corpus.

The latest CTEQ6.6 parton distributions, obtained by global analysis of hard-scattering data in the framework of general-mass perturbative QCD, are employed to study theoretical predictions and their uncertainties for significant processes at the Fermilab Tevatron and CERN Large Hadron Collider. The previously observed increase in predicted cross sections for the standard-candle W and Z boson production processes in the general-mass scheme (compared to those in the zero-mass scheme) is further investigated and quantified. A novel method to constrain parton distribution function (PDF) uncertainties in LHC observables, by effectively exploiting PDF-induced correlations with benchmark standard model cross sections, is presented. Using this method, we show that the tt cross section can potentially serve as a standard-candle observable for the LHC processes dominated by initial-state gluon scattering. Among other benefits, precise measurements of tt cross sections would reduce PDF uncertainties in predictions for single top-quark and Higgs boson production in the standard model and minimal supersymmetric standard model.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/9603011675c8d55c26ccac767424567bca6adbb0

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In Nuclear and High Energy Physics

Citations in the corpus

Non-resonant new physics in top pair production at hadron colliders (2010, methodology): “epends on the coeﬃcient of the operator Ohg. Our results for tt¯production are obtained by the convolution of the analytic diﬀerential cross section of Eqs. (27) and (28) with the pdf (taking CTEQ6L1 [52]). We have also implemented the new vertices in MadGraph [53] and used them to validate our resu”
EPS09: A New Generation of NLO and LO Nuclear Parton Distribution Functions (2009, methodology): “[51, 52]) implements a somewhat better organized method for treating the heavy quarks than the ZM-VFNS employed in this analysis.”
NLO matrix elements and truncated showers (2010, neutral): “6 parton distribution functions [25], (and, correspondingly, the MS subtraction scheme) with αS(mZ) = 0.”
The Structure of the Proton in the LHC Precision Era (2017, background): “Similar considerations also apply for the absolute cross sections, where in particular the ratios of total W± and Z cross sections at the LHC are known to be quite sensitive to the strangeness PDF [265].”
Handbook of LHC Higgs Cross Sections: 1. Inclusive Observables (2011, neutral): “6 [239]), GJR [240, 241], HERAPDF (HERAPDF1.”