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Title: Comparison of nucleon form factors from lattice QCD against the light front cloudy bag model and extrapolation to the physical mass regime

Abstract

We explore the possibility of extrapolating state of the art lattice QCD calculations of nucleon form factors to the physical regime. We find that the lattice results can be reproduced using the light front cloudy bag model by letting its parameters be analytic functions of the quark mass. We then use the model to extend the lattice calculations to large values of Q{sup 2} of interest to current and planned experiments. These functions are also used to define extrapolations to the physical value of the pion mass, thereby allowing us to study how the predicted zero in G{sub E}(Q{sup 2})/G{sub M}(Q{sup 2}) varies as a function of quark mass.

Authors:
; ;  [1]
  1. Louisiana State University, Department of Physics and Astronomy, 202 Nicholson Hall, Tower Dr., Baton Rouge, Louisiana 70803 (United States)
Publication Date:
OSTI Identifier:
20698697
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 71; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevC.71.055204; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANALYTIC FUNCTIONS; BAG MODEL; COMPARATIVE EVALUATIONS; ELECTROMAGNETIC FORM FACTORS; EXTRAPOLATION; LATTICE FIELD THEORY; NUCLEONS; PIONS; QUANTUM CHROMODYNAMICS; QUARKS; REST MASS

Citation Formats

Matevosyan, Hrayr H, Miller, Gerald A, Thomas, Anthony W, and Thomas Jefferson National Accelerator Facility, 12000 Jefferson Ave., Newport News, Virginia 23606, University of Washington, Department of Physics, Box 351560, Seattle, Washington 98195-1560, and Thomas Jefferson National Accelerator Facility, 12000 Jefferson Ave., Newport News, Virginia 23606. Comparison of nucleon form factors from lattice QCD against the light front cloudy bag model and extrapolation to the physical mass regime. United States: N. p., 2005. Web. doi:10.1103/PhysRevC.71.055204.
Matevosyan, Hrayr H, Miller, Gerald A, Thomas, Anthony W, and Thomas Jefferson National Accelerator Facility, 12000 Jefferson Ave., Newport News, Virginia 23606, University of Washington, Department of Physics, Box 351560, Seattle, Washington 98195-1560, & Thomas Jefferson National Accelerator Facility, 12000 Jefferson Ave., Newport News, Virginia 23606. Comparison of nucleon form factors from lattice QCD against the light front cloudy bag model and extrapolation to the physical mass regime. United States. https://doi.org/10.1103/PhysRevC.71.055204
Matevosyan, Hrayr H, Miller, Gerald A, Thomas, Anthony W, and Thomas Jefferson National Accelerator Facility, 12000 Jefferson Ave., Newport News, Virginia 23606, University of Washington, Department of Physics, Box 351560, Seattle, Washington 98195-1560, and Thomas Jefferson National Accelerator Facility, 12000 Jefferson Ave., Newport News, Virginia 23606. 2005. "Comparison of nucleon form factors from lattice QCD against the light front cloudy bag model and extrapolation to the physical mass regime". United States. https://doi.org/10.1103/PhysRevC.71.055204.
@article{osti_20698697,
title = {Comparison of nucleon form factors from lattice QCD against the light front cloudy bag model and extrapolation to the physical mass regime},
author = {Matevosyan, Hrayr H and Miller, Gerald A and Thomas, Anthony W and and Thomas Jefferson National Accelerator Facility, 12000 Jefferson Ave., Newport News, Virginia 23606 and University of Washington, Department of Physics, Box 351560, Seattle, Washington 98195-1560 and Thomas Jefferson National Accelerator Facility, 12000 Jefferson Ave., Newport News, Virginia 23606},
abstractNote = {We explore the possibility of extrapolating state of the art lattice QCD calculations of nucleon form factors to the physical regime. We find that the lattice results can be reproduced using the light front cloudy bag model by letting its parameters be analytic functions of the quark mass. We then use the model to extend the lattice calculations to large values of Q{sup 2} of interest to current and planned experiments. These functions are also used to define extrapolations to the physical value of the pion mass, thereby allowing us to study how the predicted zero in G{sub E}(Q{sup 2})/G{sub M}(Q{sup 2}) varies as a function of quark mass.},
doi = {10.1103/PhysRevC.71.055204},
url = {https://www.osti.gov/biblio/20698697}, journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 5,
volume = 71,
place = {United States},
year = {Sun May 01 00:00:00 EDT 2005},
month = {Sun May 01 00:00:00 EDT 2005}
}