skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: A Study of the PDF Uncertainty on the LHC W-Boson Mass Measurement

Abstract

The determination of the $W$-boson mass through an analysis of the decay charged-lepton transverse momentum distribution has a sizable uncertainty due to the imperfect knowledge of the relevant parton distribution functions (PDFs). In this paper, a quantitative assessment of the $W$-boson mass uncertainty at the LHC resulting from the PDF uncertainty is examined. We use the CT14 NNLO PDFs with a NNLL + NNLO calculation (ResBos) to simulate the $W$-boson production and decay kinematics. The uncertainty of the $W$-boson mass determination is then determined as a function of the boson and lepton kinematics. For $$W^{+}$$ production using $$P_{T}^{W} < 15$$ GeV and $$35 < P_{T}^{l}$$ (GeV) $< 45$, PDF uncertainties (at the 68% CL) of $$^{+16.0}_{-17.5}$$ MeV, $$^{+13.9}_{-14.8}$$ MeV, and $$^{+12.2}_{-19.2}$$ MeV, are determined at 7 TeV, 8 TeV and 13 TeV respectively. The uncertainties of $$W^{-}$$ for the same cuts are found to be $$^{+15.9}_{-15.6}$$ MeV, $$^{+15.0}_{-12.7}$$ MeV and $$^{+14.8}_{-15.3}$$ MeV, at 7 TeV, 8 TeV and 13 TeV respectively.

Authors:
 [1]; ORCiD logo [2];  [3]
  1. Jordan U.
  2. Fermilab
  3. Michigan State U.
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1545088
Report Number(s):
arXiv:1905.00110; FERMILAB-PUB-19-185-T
1732508
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article
Journal Name:
TBD
Additional Journal Information:
Journal Name: TBD
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Hussein, Moh'd, Isaacson, Joshua, and Huston, Joey. A Study of the PDF Uncertainty on the LHC W-Boson Mass Measurement. United States: N. p., 2019. Web.
Hussein, Moh'd, Isaacson, Joshua, & Huston, Joey. A Study of the PDF Uncertainty on the LHC W-Boson Mass Measurement. United States.
Hussein, Moh'd, Isaacson, Joshua, and Huston, Joey. Tue . "A Study of the PDF Uncertainty on the LHC W-Boson Mass Measurement". United States. https://www.osti.gov/servlets/purl/1545088.
@article{osti_1545088,
title = {A Study of the PDF Uncertainty on the LHC W-Boson Mass Measurement},
author = {Hussein, Moh'd and Isaacson, Joshua and Huston, Joey},
abstractNote = {The determination of the $W$-boson mass through an analysis of the decay charged-lepton transverse momentum distribution has a sizable uncertainty due to the imperfect knowledge of the relevant parton distribution functions (PDFs). In this paper, a quantitative assessment of the $W$-boson mass uncertainty at the LHC resulting from the PDF uncertainty is examined. We use the CT14 NNLO PDFs with a NNLL + NNLO calculation (ResBos) to simulate the $W$-boson production and decay kinematics. The uncertainty of the $W$-boson mass determination is then determined as a function of the boson and lepton kinematics. For $W^{+}$ production using $P_{T}^{W} < 15$ GeV and $35 < P_{T}^{l}$ (GeV) $< 45$, PDF uncertainties (at the 68% CL) of $^{+16.0}_{-17.5}$ MeV, $^{+13.9}_{-14.8}$ MeV, and $^{+12.2}_{-19.2}$ MeV, are determined at 7 TeV, 8 TeV and 13 TeV respectively. The uncertainties of $W^{-}$ for the same cuts are found to be $^{+15.9}_{-15.6}$ MeV, $^{+15.0}_{-12.7}$ MeV and $^{+14.8}_{-15.3}$ MeV, at 7 TeV, 8 TeV and 13 TeV respectively.},
doi = {},
journal = {TBD},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {4}
}