Quarkonium TMD fragmentation functions in NRQCD

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Abstract

We study the transverse-momentum spectrum of quarkonium production from single light-parton fragmentation mechanism. In the case of semi-inclusive deep inelastic scattering, we observe that there are two possible initiating processes, namely photon-gluon fusion and light-quark fragmentation. For the second case we derive the factorization theorem, which involves a new hadronic quantity: the quarkonium transverse-momentum-dependent fragmentation functions in NRQCD. We calculate their matching onto the non-perturbative long distance matrix elements at the lowest order in the strong-coupling constant, \( \mathcal{O}\left({\alpha}_s^2\right) \). Focusing on the case of the electron-ion collider, we make a comparative phenomenological study of the two production mechanisms and find the regions of the phase space where one is dominant over the other.

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Gluon TMD fragmentation function into quarkonium

Article Open access 27 December 2023

NLO fragmentation functions for a quark into a spin-singlet quarkonium: same flavor case

Article Open access 05 July 2021

Gluon fragmentation into quarkonium at next-to-leading order

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Departamento de Física y Matematicas, Universidad de Alcalá, 28805, Alcalá de Henares (Madrid), Spain
Miguel G. Echevarria
INFN Sezione di Pavia, via Bassi 6, I-27100, Pavia, Italy
Yiannis Makris
Departamento de Física Teórica & IPARCOS, Universidad Complutense de Madrid, E-28040, Madrid, Spain
Ignazio Scimemi

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Miguel G. Echevarria
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Yiannis Makris
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Ignazio Scimemi
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Correspondence to Miguel G. Echevarria.

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Echevarria, M.G., Makris, Y. & Scimemi, I. Quarkonium TMD fragmentation functions in NRQCD. J. High Energ. Phys. 2020, 164 (2020). https://doi.org/10.1007/JHEP10(2020)164

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Received: 21 July 2020
Revised: 10 September 2020
Accepted: 23 September 2020
Published: 26 October 2020
DOI: https://doi.org/10.1007/JHEP10(2020)164

Quarkonium TMD fragmentation functions in NRQCD

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Gluon TMD fragmentation function into quarkonium

NLO fragmentation functions for a quark into a spin-singlet quarkonium: same flavor case

Gluon fragmentation into quarkonium at next-to-leading order

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Quarkonium TMD fragmentation functions in NRQCD

Abstract

Article PDF

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Gluon TMD fragmentation function into quarkonium

NLO fragmentation functions for a quark into a spin-singlet quarkonium: same flavor case

Gluon fragmentation into quarkonium at next-to-leading order

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