Spin-dependent quark beam function at NNLO

Radja Boughezal, Francis John Petriello, Ulrich Schubert, Hongxi Xing

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


We calculate the beam function for longitudinally polarized quarks through next-to-next-to-leading order (NNLO) in QCD perturbation theory. This is the last missing ingredient needed to apply the factorization theorem for the N-jettiness event-shape variable in a variety of polarized collisions through the NNLO level. We present all technical details of our derivation. As a by-product of our calculation we provide the first independent check of the previously obtained unpolarized quark beam function. We anticipate that our result will have phenomenological applications in describing data from polarized collisions.

Original languageEnglish (US)
Article number034001
JournalPhysical Review D
Issue number3
StatePublished - Aug 1 2017

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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