Lattice computations of the pion form factor

Journal Article · Thu Sep 01 04:00:00 EDT 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.72.054506· OSTI ID:20711465

Bonnet, Frederic D.R. ^[1]; Edwards, Robert G; Richards, David G ^[2]; Fleming, George T ^[2]; Lewis, Randy ^[1]

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1. Department of Physics, University of Regina, Regina, SK, S4S 0A2 (Canada)
2. Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606 (United States)

We report on a program to compute the electromagnetic form factors of mesons. We discuss the techniques used to compute the pion form factor and present results computed with domain-wall valence fermions on MILC asqtad lattices, as well as with Wilson fermions on quenched lattices. We find that the full-QCD form factor is well described by a VMD picture, with the pole mass in the chiral limit m{sub VMD}=0.868(65) GeV. However, the quenched Wilson fermion results are suggestive of large scaling violations.

• OSTI ID: 20711465
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 5 Vol. 72; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHIRALITY
ELECTROMAGNETIC FORM FACTORS
FERMIONS
GEV RANGE
LATTICE FIELD THEORY
PIONS
QUANTUM CHROMODYNAMICS
REST MASS
VALENCE