$Polarized $J/\psi$ production in semi-inclusive DIS at large $Q^2$: Comparing quark fragmentation and photon-gluon fusion$

Polarized $J/\psi$ production in semi-inclusive DIS at large $Q^2$: Comparing quark fragmentation and photon-gluon fusion

We compare the relative importance of different mechanisms for polarized $J/\psi$ production in semi-inclusive deep inelastic scattering processes at large $Q^2$. The transverse momentum dependent (TMD) factorization framework and nonrelativistic quantum chromodynamics are used to study the lead...

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Veröffentlicht in:	arXiv.org 2024-04
Hauptverfasser:	Copeland, Marston, Fleming, Sean, Gupta, Rohit, Hodges, Reed, Mehen, Thomas
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Sprache:	eng
Schlagworte:	Color Distribution functions Fragmentation Gluons Inelastic scattering Kinematics Partons Photons Quantum chromodynamics Quarks Transverse momentum
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description	We compare the relative importance of different mechanisms for polarized $J/\psi$ production in semi-inclusive deep inelastic scattering processes at large $Q^2$. The transverse momentum dependent (TMD) factorization framework and nonrelativistic quantum chromodynamics are used to study the leading contributions from light quark fragmentation to polarized $J/\psi$, 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 $^3S_1^{[8]}$ matrix element, as well as regimes where photon gluon fusion dominates, suggesting that the gluon TMD parton distribution function can be probed.
doi_str_mv	10.48550/arxiv.2310.13737
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subjects	Color Distribution functions Fragmentation Gluons Inelastic scattering Kinematics Partons Photons Quantum chromodynamics Quarks Transverse momentum
title	Polarized $J/\psi$ production in semi-inclusive DIS at large $Q^2$: Comparing quark fragmentation and photon-gluon fusion
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Polarized \(J/\psi\) production in semi-inclusive DIS at large \(Q^2\): Comparing quark fragmentation and photon-gluon fusion