Phases of Augmented Hadronic Light-Front Wave Functions
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.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-76SF00515
- OSTI ID:
- 972254
- Report Number(s):
- SLAC-PUB-13874; arXiv:1001.1163; TRN: US1001992
- Journal Information:
- Submitted to Physics Letters B, Journal Name: Submitted to Physics Letters B
- Country of Publication:
- United States
- Language:
- English
Similar Records
Novel Spin Effects in QCD
Transversity from First Principles in QCD
Related Subjects
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ASYMMETRY
BOUNDARY CONDITIONS
DIFFRACTION
FACTORIZATION
LIGHT CONE
NUCLEONS
PERTURBATION THEORY
PIONS
QUANTUM CHROMODYNAMICS
QUARKS
RESCATTERING
SCATTERING
TRANSVERSE MOMENTUM
VALENCE
WAVE FUNCTIONS
Phenomenology-HEP
HEPPH
HEPTH