Phenomenological Implications of the Nucleon’s Meson Cloud

The long-distance structure of the interacting nucleon receives important contributions from its couplings to light hadronic degrees of freedom—a light meson cloud—while an analogous nonperturbative mechanism is expected to generate an intrinsic charm (IC) component to the proton wavefunction. We investigate both possibilities, keeping for the former a special eye to improving the theoretical understanding of the pion-nucleon vertex in light of proposed measurements. Regarding the latter possibility of IC, we highlight recent results obtained by a global QCD analysis of the light-front model proposed in Hobbs et al. (Phys Rev D 89:074008, 2014).

Note:

6 pages, 3 figures, presented at Light Cone 2014 in Raleigh, NC, corrected version. The final publication is available at Springer via http://dx.doi.org/10.1007/s00601-015-0967-y, Few-Body Systems, Feb. 2015

meson: cloud
nucleon: interaction
p: wave function
quantum chromodynamics
nonperturbative
light front
charm
pi nucleon: vertex function

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Figures(6)

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