New determination of ST Y N | q ¯ DμDνq |N Y based on recent experimental constraints

Philipp Gubler, Kie Sang Jeong, Su Houng Lee

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14 Citations (Scopus)


The symmetric and traceless part of the matrix element ST Y N|q¯DμDνq|N Y can be determined from the second moment of the twist-3 parton distribution function e(x). Recently, novel experimental data on e(x) have become available, which enables us to evaluate the magnitude of the above matrix element with considerably reduced systematic uncertainties. Based on the new experimental data, we show that ST Y N|q¯DμDνq|N Y is likely to be at least an order of magnitude smaller than what previous model-based estimates have so far suggested. We discuss the consequences of this observation for the analysis of deep inelastic scattering and QCD sum rules studies at finite density for the vector meson and the nucleon in which this matrix element is being used as an input parameter.

Original languageEnglish
Article number014010
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number1
Publication statusPublished - 2015 Jul 7

Bibliographical note

Publisher Copyright:
© 2015 American Physical Society.

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)


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