Direct Probes of Linearly Polarized Gluons inside Unpolarized Hadrons

Daniel Boer*, Stanley J. Brodsky, Piet J. Mulders, Cristian Pisano

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

95 Citations (Scopus)

Abstract

We show that linearly polarized gluons inside unpolarized hadrons can be directly probed in jet or heavy quark pair production in electron-hadron collisions. We discuss the simplest cos2 phi asymmetries and estimate their maximal value, concluding that measurements of the unknown linearly polarized gluon distribution in the proton should be feasible in future Electron-Ion Collider or Large Hadron electron Collider experiments. Analogous asymmetries in hadron-hadron collisions suffer from factorization breaking contributions and would allow us to quantify the importance of initial- and final-state interactions.

Original languageEnglish
Article number132001
Number of pages4
JournalPhysical Review Letters
Volume106
Issue number13
DOIs
Publication statusPublished - 31-Mar-2011

Keywords

  • DEEP-INELASTIC SCATTERING
  • FINAL-STATE INTERACTIONS
  • SINGLE-SPIN ASYMMETRIES
  • ANGULAR-DISTRIBUTIONS
  • PARTON DISTRIBUTIONS
  • NEGATIVE PIONS
  • DRELL-YAN
  • MUON
  • TUNGSTEN

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