@article{3ebba5d0fabc49a39fab81c085dc024c,
title = "Spin-dependent quark beam function at NNLO",
abstract = "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.",
author = "Radja Boughezal and Petriello, {Francis John} and Ulrich Schubert and Hongxi Xing",
note = "Funding Information: We thank A. Vladimirov for questions regarding the factorization scheme dependence in an initial version of this manuscript, which led to corrections in our NNLO matching coefficients and an expanded discussion of this topic. We thank X. Liu and P. Mastrolia for helpful conversations. R. B. and U.S. are supported by the DOE Contract No. DE-AC02-06CH11357. F. P. and H. X. are supported by the DOE Grants No. DE-FG02-91ER40684 and No. DE-AC02-06CH11357. This research was also supported in part by the NSF under Grant No. NSF PHY-1125915 to the Kavli Institute of Theoretical Physics in Santa Barbara, which we thank for hospitality during the completion of this manuscript. Publisher Copyright: {\textcopyright} 2017 American Physical Society.",
year = "2017",
month = aug,
day = "1",
doi = "10.1103/PhysRevD.96.034001",
language = "English (US)",
volume = "96",
journal = "Physical Review D",
issn = "2470-0010",
publisher = "American Physical Society",
number = "3",
}