Polarized J/ψ production in semi-inclusive DIS at large Q2: Comparing quark fragmentation and photon-gluon fusion

Marston Copeland; Sean Fleming; Rohit Gupta; Reed Hodges; Thomas Mehen

doi:10.1103/PhysRevD.109.074032

Polarized J/ψ production in semi-inclusive DIS at large Q2: Comparing quark fragmentation and photon-gluon fusion

Marston Copeland, Sean Fleming, Rohit Gupta, Reed Hodges, Thomas Mehen

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

We compare the relative importance of different mechanisms for polarized J/ψ production in semi-inclusive deep inelastic scattering processes at large Q2. The transverse momentum dependent (TMD) factorization framework and nonrelativistic quantum chromodynamics are used to study the leading contributions from light quark fragmentation to polarized J/ψ, and compared to direct production via photon-gluon fusion, which can proceed through color-singlet as well as color-octet mechanisms. We identify kinematic regimes where light quark fragmentation dominates, allowing for the extraction of the S31[8] matrix element, as well as regimes where photon gluon fusion dominates, suggesting that the gluon TMD parton distribution function can be probed.

Original language	English (US)
Article number	074032
Journal	Physical Review D
Volume	109
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevD.109.074032
State	Published - Apr 1 2024
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1103/PhysRevD.109.074032

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title = "Polarized J/ψ production in semi-inclusive DIS at large Q2: Comparing quark fragmentation and photon-gluon fusion",

abstract = "We compare the relative importance of different mechanisms for polarized J/ψ production in semi-inclusive deep inelastic scattering processes at large Q2. The transverse momentum dependent (TMD) factorization framework and nonrelativistic quantum chromodynamics are used to study the leading contributions from light quark fragmentation to polarized J/ψ, and compared to direct production via photon-gluon fusion, which can proceed through color-singlet as well as color-octet mechanisms. We identify kinematic regimes where light quark fragmentation dominates, allowing for the extraction of the S31[8] matrix element, as well as regimes where photon gluon fusion dominates, suggesting that the gluon TMD parton distribution function can be probed.",

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AU - Gupta, Rohit

AU - Hodges, Reed

AU - Mehen, Thomas

N1 - Publisher Copyright: © 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

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AB - We compare the relative importance of different mechanisms for polarized J/ψ production in semi-inclusive deep inelastic scattering processes at large Q2. The transverse momentum dependent (TMD) factorization framework and nonrelativistic quantum chromodynamics are used to study the leading contributions from light quark fragmentation to polarized J/ψ, and compared to direct production via photon-gluon fusion, which can proceed through color-singlet as well as color-octet mechanisms. We identify kinematic regimes where light quark fragmentation dominates, allowing for the extraction of the S31[8] matrix element, as well as regimes where photon gluon fusion dominates, suggesting that the gluon TMD parton distribution function can be probed.

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Polarized J/ψ production in semi-inclusive DIS at large Q2: Comparing quark fragmentation and photon-gluon fusion

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