Proton-PDF uncertainties in extracting nuclear PDFs from production in p+Pb collisions
arXiv:2202.01074 · doi:10.1140/epjc/s10052-022-10179-2
Abstract
We discuss the recent CMS Collaboration measurement of boson production in p+Pb collisions at 8.16 TeV in terms of the constraining power on nuclear parton distribution functions (PDFs). The impact of the free-proton PDF uncertainties on the nuclear PDF extraction is quantified by using a theoretical covariance-matrix method and Hessian PDF reweighting. We discuss different ways to mitigate these theoretical uncertainties, including self-normalization, forward-to-backward ratios and nuclear-modification ratios. It is found that none of these methods offer perfect cancellation of the free-proton PDFs but, with the present data uncertainties, the residual free-proton-PDF dependence has, conveniently for the global analyses, little effect on the extraction of the nuclear modifications. Based on a simple estimate of obtainable statistics at the LHC Run 3, we argue that this will change in the near future and it becomes more important to propagate the proton-PDF uncertainties accordingly. Using the obtained information on the correlations of the free-proton uncertainties, we also identify a new charge asymmetry ratio, where the cancellation of the proton-PDF uncertainties is found to be extremely good.
arXiv comment15 pages, 17 figures
References in corpus (49)
- New parton distribution functions from a global analysis of quantum chromodynamics
- EPS09 - a New Generation of NLO and LO Nuclear Parton Distribution Functions
- New CTEQ global analysis of quantum chromodynamics with high-precision data from the LHC
- nCTEQ15 - Global analysis of nuclear parton distributions with uncertainties in the CTEQ framework
- EPPS16: Nuclear parton distributions with LHC data
- Parton distributions from LHC, HERA, Tevatron and fixed target data: MSHT20 PDFs
- Determination of nuclear parton distribution functions and their uncertainties at next-to-leading order
- Physics Opportunities with the 12 GeV Upgrade at Jefferson Lab
- Nuclear parton distributions at next to leading order
- Global Analysis of Nuclear Parton Distributions
- Scale evolution of nuclear parton distributions
- Determination of nuclear parton distributions
- Nuclear parton distribution functions and their uncertainties
- An improved global analysis of nuclear parton distribution functions including RHIC data
- Gluon Shadowing in Heavy-Flavor Production at the LHC
- PDF Nuclear Corrections for Charged Lepton and Neutrino Deep Inelastic Scattering Processes
- The scale dependent nuclear effects in parton distributions for practical applications
- PDF reweighting in the Hessian matrix approach
- Global analysis of nuclear parton distribution functions and their uncertainties at next-to-next-to-leading order
- Measurement of the differential cross section and charge asymmetry for inclusive pp to W + X production at sqrt(s) = 8 TeV
- Study of prompt D meson production in pPb collisions at =5 TeV
- Nuclear Parton Distributions from Lepton-Nucleus Scattering and the Impact of an Electron-Ion Collider
- Constraints for the nuclear parton distributions from Z and W production at the LHC
- Uncertainties in determining parton distributions at large x
- nNNPDF2.0: Quark Flavor Separation in Nuclei from LHC Data
- Updating and Optimizing Error PDFs in the Hessian Approach
- Towards Ultimate Parton Distributions at the High-Luminosity LHC
- Study of W boson production in pPb collisions at sqrt(s[NN]) = 5.02 TeV
- Agreement of Neutrino Deep Inelastic Scattering Data with Global Fits of Parton Distributions
- Open-source QCD analysis of nuclear parton distribution functions at NLO and NNLO
- Non-quadratic improved Hessian PDF reweighting and application to CMS dijet measurements at 5.02 TeV
- Publishing statistical models: Getting the most out of particle physics experiments
- NNLO nuclear parton distribution functions with electroweak-boson production data from the LHC
- Impact of LHC vector boson production in heavy ion collisions on strange PDFs
- Constraining gluon distributions in nuclei using dijets in proton-proton and proton-lead collisions at 5.02 TeV
- A QCD analysis of LHCb D-meson data in p+Pb collisions
- Nuclear parton distribution functions with uncertainties in a general mass variable flavor number scheme
- Observation of nuclear modifications in W boson production in pPb collisions at 8.16 TeV
- A global reanalysis of nuclear parton distribution functions
- Strange Quark PDFs and Implications for Drell-Yan Boson Production at the LHC
- Vector boson production in proton-lead and lead-lead collisions at the LHC and its impact on nCTEQ15 PDFs
- On the Consistent Use of Scale Variations in PDF Fits and Predictions
- nCTEQ15HIX -- Extending nPDF Analyses into the High-, Low Region
- Updating and Optimizing Error PDFs in the Hessian Approach. Part II
- A perturbative QCD study of dijets in p+Pb collisions at the LHC
- Correlation of Theoretical Uncertainties in PDF Fits and Theoretical Uncertainties in Predictions
- Searching for flavor dependence in nuclear quark behavior
- Scaling properties of inclusive W production at hadron colliders
- Nuclear gluons at RHIC in a multi-observable approach
Cited by in corpus (7)
- Impact of heavy quark and quarkonium data on nuclear gluon PDFs
- Compatibility of Neutrino DIS Data and Its Impact on Nuclear Parton Distribution Functions
- A unified description of small, peripheral, and large system suppression data from pQCD
- Hard processes in multi-TeV ion collisions
- Reduced cross-section in Electron-Ion Colliders at small
- The Forward Physics Facility at the High-Luminosity LHC
- EPPS21: A global QCD analysis of nuclear PDFs