Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1995-07-04
Phys.Rev.D53:2586-2598,1996
Physics
High Energy Physics
High Energy Physics - Phenomenology
34 pages, RevTeX, 6 figures optionally included using epsfig.sty
Scientific paper
10.1103/PhysRevD.53.2586
We address the question whether the nucleon's antiquark sea can be attributed entirely to its virtual meson cloud and, in essence, whether there exists a smooth transition between hadronic and quark-gluon degrees of freedom. We take into account contributions from $\pi$ and $K$ mesons and compare with the nucleon's antiquark distributions which serve as a non-perturbative input to the QCD evolution equations. We elucidate the different behavior in the flavor singlet and non-singlet channels and study the dependence of our results on the scale $Q^2$. The meson-nucleon cut-offs that we determine give not only an indication on the size of the region within which quarks are confined in a nucleon, but we find that the scale of these form factors is closely related to the four-momentum transfer, $Q^2$, where gluons are resolved by a high energy probe, and that large meson loop momenta, $|{\bf k}| \approx 0.8$ GeV, contribute significantly to the sea quark distributions. While the agreement of our calculations with data-based parametrizations is satisfactory and scale independent for the flavor breaking share of the nucleon's antiquark sea, the flavor singlet component is quite poorly described. This hints the importance of gluon degrees of freedom.
Frankfurt Leonid L.
Koepf Wolfram
Strikman Mark
No associations
LandOfFree
The Nucleon's Virtual Meson Cloud and Deep Inelastic Lepton Scattering does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Nucleon's Virtual Meson Cloud and Deep Inelastic Lepton Scattering, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Nucleon's Virtual Meson Cloud and Deep Inelastic Lepton Scattering will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-264340