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arxiv: 1104.5651 · v1 · submitted 2011-04-29 · ✦ hep-ph · nucl-th

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On the Origin of Model Relations among Transverse-Momentum Dependent Parton Distributions

C. Lorce (Mainz U. , Inst. Kernphys.) , B. Pasquini (Pavia U. & INFN , Pavia , Italy)
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classification ✦ hep-ph nucl-th
keywords relationstmdsdependentdistributionsmodelsoriginpartonquark
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Transverse-momentum dependent parton distributions (TMDs) are studied in the framework of quark models. In particular, quark-model relations among TMDs are reviewed, elucidating their physical origin in terms of the quark-spin structure in the nucleon. The formal aspects of the derivation of these relations are complemented with explicit examples, emphasizing how and to which extent the conditions which lead to relations among TMDs are implemented in different classes of quark models.

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  1. Transverse energy-momentum tensor distributions in polarized nucleons

    hep-ph 2026-04 unverdicted novelty 6.0

    The quantum phase-space formalism derives transverse energy-momentum tensor distributions in polarized nucleons and reproduces standard light-front distributions including bad components in the infinite-momentum frame.