Polarized mesons and the asymmetry between (d)over-bar(x) and (u)over-bar(x) Academic Article

abstract

• We present a calculation of the polarized meson cloud in a nucleon using time-ordered perturbation theory in two different variants advocated in the literature. We calculate the induced difference between the distributions d(x) and (x). We use a recent lattice calculation to motivate an ansatz for the polarized valence quark distribution of the meson. Our calculations show that the two theoretical approaches give vastly different results. We conclude that d(x) - (x) can be of relevant size with important consequences for the combined fits of polarized distribution functions. 1998 Elsevier Science B.V. All rights reserved.

authors

• Fries, Rainer

published proceedings

• PHYSICS LETTERS B

author list (cited authors)

• Fries, R. J., & Schfer, A.

citation count

• 22

complete list of authors

• Fries, RJ||Schäfer, A

publication date

• December 1998

publisher

• Elsevier  Publisher

keywords

• Flavor Asymmetries In The Polarized Sea
• Meson Cloud Model
• Polarized Parton Distributions
• Rho Meson
• Sea Quarks
• Time-ordered Perturbation Theory

Digital Object Identifier (DOI)

• 10.1016/S0370-2693(98)01307-0

start page

• 40

end page

• 44

volume

• 443

issue

• 1-4

URL

• http://dx.doi.org/10.1016/s0370-2693(98)01307-0