In 2015, the PHENIX collaboration has measured very forward ($\eta >6.8$) single spin asymmetries of inclusive neutrons in transversely polarized proton-proton and proton-nucleus collisions at a center of mass energy of 200 GeV. A previous publication from this dataset concentrated on the nuclear dependence of such asymmetries. In this measurement the explicit transverse momentum dependence of inclusive neutron single spin asymmetries for proton-proton collisions is extracted using a bootstrapping unfolding technique on the transverse momenta. This explicit transverse momentum dependence will help improve the understanding of the mechanisms that create these asymmetries.

• Received 30 November 2020
• Accepted 21 January 2021

DOI:https://doi.org/10.1103/PhysRevD.103.032007

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Published by the American Physical Society