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- W3098832135 abstract "A bstract The aim of this paper is to introduce a general way to stabilize the perturbative QCD computations of heavy quarkonium production in the boosted or high-momentum transferring region with tree-level generators only. Such an approach is possible by properly taking into account the power-enhanced perturbative contributions in a soft and collinear safe manner without requiring any complete higher-order computations. The complicated NLO results for inclusive quarkonium hadroproduction can be well reproduced within our approach based on a tree-level generator HELAC-O nia . We have applied it to estimate the last missing leading-twist contribution from the spin-triplet color-singlet S-wave production at $$ mathcal{O}left({alpha}_s^5right) $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>O</mml:mi> <mml:mfenced> <mml:msubsup> <mml:mi>α</mml:mi> <mml:mi>s</mml:mi> <mml:mn>5</mml:mn> </mml:msubsup> </mml:mfenced> </mml:math> , which is a NNLO term in the α s expansion for the quarkonium P T spectrum. We conclude that the missing NNLO contribution will not change the order of the magnitude of the short-distance coefficient. Such an approach is also quite appealing as it foresees broad applications in quarkonium-associated production processes, which are mostly absent of complete higher-order computations and fragmentation functions." @default.
- W3098832135 created "2020-11-23" @default.
- W3098832135 creator A5001430931 @default.
- W3098832135 date "2019-01-01" @default.
- W3098832135 modified "2023-10-16" @default.
- W3098832135 title "Boosting perturbative QCD stability in quarkonium production" @default.
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- W3098832135 doi "https://doi.org/10.1007/jhep01(2019)112" @default.
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