A1 Journal article (refereed)
Complete next-to-leading order calculation of single inclusive π0 production in forward proton-nucleus collisions (2024)

Mäntysaari, H., & Tawabutr, Y. (2024). Complete next-to-leading order calculation of single inclusive π0 production in forward proton-nucleus collisions. Physical Review D, 109(3), Article 034018. https://doi.org/10.1103/PhysRevD.109.034018

JYU authors or editors

Publication details

All authors or editors: Mäntysaari, Heikki; Tawabutr, Yossathorn

Journal or series: Physical Review D

ISSN: 2470-0010

eISSN: 2470-0029

Publication year: 2024

Publication date: 20/02/2024

Volume: 109

Issue number: 3

Article number: 034018

Publisher: American Physical Society (APS)

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/PhysRevD.109.034018

Publication open access: Openly available

Publication channel open access: Partially open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/94570

Publication is parallel published: https://arxiv.org/abs/2310.06640

Abstract

We present the first fully consistent calculation of inclusive π0 production at forward rapidities at next-to-leading order (NLO) accuracy in proton-lead collisions at √s=8.16 TeV within the color glass condensate approach. The center-of-mass energy dependence is determined by the Balitsky-Kovchegov equation with the initial condition constrained at NLO accuracy by the proton structure function measurements. We find that the LHCb data further constrain this nonperturbative input, and that both the NLO corrections to the evolution equation and to the impact factor have significant effects on the nuclear modification factor RpPb. The complete NLO calculation is shown to be in qualitative agreement with the LHCb data, and the predictions are found to be sensitive to the details of the applied deep inelastic scattering (DIS) fit. These results demonstrate the need to perform global analyses of DIS and LHC data in order to probe gluon saturation phenomena at precision level at very small momentum fraction x.

Keywords: particle physics; pions

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Ministry reporting: Yes

Reporting Year: 2024

Preliminary JUFO rating: 2