Higher-Twist Contribution to Pion Structure Function: 4-Fermi Operators

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dc.creatorCapitani, S.
dc.creatorGöckeler, M.
dc.creatorHorsley, R.
dc.creatorKlaus, B.
dc.creatorLinke, V.
dc.creatorRakow, P. E. L.
dc.creatorSchäfer, A.
dc.creatorSchierholz, G.
dc.date1999-08-12
dc.date1999-12-30
dc.date.accessioned2026-07-07T11:47:22Z
dc.date.available2026-07-07T11:47:22Z
dc.descriptionWe present quenched lattice QCD results for the contribution of higher-twist operators to the lowest non-trivial moment of the pion structure function. To be specific, we consider the combination $F_2^{π^+} + F_2^{π^-} - 2 F_2^{π^0}$ which has $I = 2$ and receives contributions from 4-Fermi operators only. We introduce the basis of lattice operators. The renormalization of the operators is done perturbatively in the $\bar{\rm{MS}}$ scheme using the 't Hooft-Veltman prescription for $γ_5$, taking particular care of mixing effects. The contribution is found to be of $O(f_π^2/Q^2)$, relative to the leading contribution to the moment of $F_2^{π^+}$.
dc.descriptionVersion to appear in Nucl. Phys. B
dc.identifierhttps://arxiv.org/abs/hep-lat/9908011
dc.identifierhttp://arxiv.org/abs/hep-lat/9908011
dc.identifierNucl.Phys.B570:393-406,2000
dc.identifierdoi:10.1016/S0550-3213(99)00815-9
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/202550
dc.subjectHigh Energy Physics - Lattice
dc.subjectHigh Energy Physics - Phenomenology
dc.titleHigher-Twist Contribution to Pion Structure Function: 4-Fermi Operators
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