Higgs Boson Cross Section from CTEQ-TEA Global Analysis

Abstract

We study the uncertainties of the Higgs boson production cross section through the gluon fusion subprocess at the LHC (with $\sqrt{s}=7,8$ and $14$ TeV) arising from the uncertainties of the parton distribution functions (PDFs) and of the value of the strong coupling constant ${\alpha }_s(M_Z)$. These uncertainties are computed by two complementary approaches, based on the Hessian and the Lagrange Multiplier methods within the CTEQ-TEA global analysis framework. We find that their predictions for the Higgs boson cross section are in good agreement. Furthermore, the result of the Lagrange Multiplier method supports the prescriptions we have previously provided for using the Hessian method to calculate the combined PDF and ${\alpha }_s$ uncertainties, and to estimate the uncertainties at the $68\%$ confidence level by scaling them from the $90\%$ confidence level.

34 pages, 9 figures, and 9 tables

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• Snowmass 2021 whitepaper: Proton structure at the precision frontier
• Updating and Optimizing Error PDFs in the Hessian Approach
• Neutrino Masses and Scalar Singlet Dark Matter
• Has a Higgs-flavon with a $750$ GeV mass been detected at the LHC13?
• Nuclear medium effects in lepton-nucleus DIS in the region of $x\gtrsim 1$