Instanton-induced charm contribution to polarized deep-inelastic scattering

Abstract

Recent data on B decays involving ${\eta }^{\prime }$ may be explained if the singlet axial current of charmed quarks has large matrix element to ${\eta }^{\prime }$, and instantons were shown to be able to generate this effect. We study the magnitude of charm contributions to nucleon polarized structure functions generated in a similar way. Comparing the charm contribution, which is related to a dim(6) gluonic operator, to that of light quarks, which are related by the anomaly equation to $G\tilde{G}$, we found that $\Delta c/\Delta \Sigma$ = -(0.2-0.08). Future experiments like COMPASS at CERN identifying charm production in DIS can measure this ``intrinsic polarized charm'' component of the nucleon.

12 pages, LaTeX, RevTex, epsfig.sty, 3 figures, one sign in Euclidean definitions corrected

References in corpus (4)

• Two-Body B Meson Decays to $\eta$ and ${\eta }^{{}^{\prime }}$ -- Observation of $B\to \eta${'}K$
• The gluon/charm content of the eta' meson and instantons
• On the Role of Charm in Decay of B-mesons to η' K
• Polarized Intrinsic Charm as a Possible Solution to the Proton Spin Problem

Cited by in corpus (6)

• Heavy quark mass expansion and intrinsic charm in light hadrons
• Spin 1/2^+, spin 3/2^+ and transition magnetic moments of low lying and charmed baryons
• The intrinsic charm contribution to the proton spin
• SU(4) Chiral Quark Model with Configuration Mixing
• Charm Antiquark and Charm Quark in the Nucleon
• About possible contribution of intrinsic charm component to inclusive spectra of charmed mesons