Phases of Augmented Hadronic Light-Front Wave Functions

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It is an important question whether the final/initial state gluonic interactions which lead to naive-time-reversal-odd single-spin asymmetries and diffraction at leading twist can be associated in a definite way with the light-front wave function hadronic eigensolutions of QCD. We use light-front time-ordered perturbation theory to obtain augmented light-front wave functions which contain an imaginary phase which depends on the choice of advanced or retarded boundary condition for the gauge potential in light-cone gauge. We apply this formalism to the wave functions of the valence Fock states of nucleons and pions, and show how this illuminates the factorization properties of naive-time-reversal-odd ... continued below

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10 pages

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Brodsky, Stanley J.; /SLAC; Pasquini, Barbara; /Pavia U. /INFN, Pavia; Xiao, Bo-Wen; /LBNL, NSD et al. February 15, 2010.

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It is an important question whether the final/initial state gluonic interactions which lead to naive-time-reversal-odd single-spin asymmetries and diffraction at leading twist can be associated in a definite way with the light-front wave function hadronic eigensolutions of QCD. We use light-front time-ordered perturbation theory to obtain augmented light-front wave functions which contain an imaginary phase which depends on the choice of advanced or retarded boundary condition for the gauge potential in light-cone gauge. We apply this formalism to the wave functions of the valence Fock states of nucleons and pions, and show how this illuminates the factorization properties of naive-time-reversal-odd transverse momentum dependent observables which arise from rescattering. In particular, one calculates the identical leading-twist Sivers function from the overlap of augmented light-front wavefunctions that one obtains from explicit calculations of the single-spin asymmetry in semi-inclusive deep inelastic lepton-polarized nucleon scattering where the required phases come from the final-state rescattering of the struck quark with the nucleon spectators.

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10 pages

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  • Journal Name: Submitted to Physics Letters B

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  • Report No.: SLAC-PUB-13874
  • Grant Number: AC02-76SF00515
  • DOI: 10.1016/j.physletb.2010.03.049 | External Link
  • Office of Scientific & Technical Information Report Number: 972254
  • Archival Resource Key: ark:/67531/metadc934736

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  • February 15, 2010

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  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 15, 2016, 3:29 p.m.

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Brodsky, Stanley J.; /SLAC; Pasquini, Barbara; /Pavia U. /INFN, Pavia; Xiao, Bo-Wen; /LBNL, NSD et al. Phases of Augmented Hadronic Light-Front Wave Functions, article, February 15, 2010; United States. (digital.library.unt.edu/ark:/67531/metadc934736/: accessed December 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.