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- W1567684597 abstract "Single-spin asymmetries were long thought to vanish in high-energy scattering processes because of their specific time-reversal behavior. Time-reversal-o dd phenomena, however, appear naturally when one includes effects of intrinsic transverse momenta of partons. The partons, quarks and gluons, enter the description of high-energy scattering pr ocesses in correlators which contain quark and gluon fields. The correlators, parameterized in te rms of distribution and fragmentation functions, constitute matrix elements of non-local field co nfigurations. For transverse momentum dependent (TMD) correlators the non-locality is along a light-front, in contrast to the non-locality along the light-cone for collinear correlators, integrate d over transverse momenta. The TMD correlators require a careful treatment to assure color gau ge invariance, leading to nontrivial gauge links connecting the parton fields. These give rise to time-r eversal-odd phenomena, showing up as single spin and azimuthal asymmetries. The gauge links, arising from multi-gluon initial and final state interactions, depend on the color flow in the proce ss, which has consequences for issues like universality and factorization." @default.
- W1567684597 created "2016-06-24" @default.
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- W1567684597 date "2009-03-09" @default.
- W1567684597 modified "2023-10-16" @default.
- W1567684597 title "Time-reversal-odd phenomena in QCD" @default.
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- W1567684597 doi "https://doi.org/10.22323/1.061.0034" @default.
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