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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2310.13737 |
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| _version_ | 1866909184074711040 |
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| author | Copeland, Marston Fleming, Sean Gupta, Rohit Hodges, Reed Mehen, Thomas |
| author_facet | Copeland, Marston Fleming, Sean Gupta, Rohit Hodges, Reed Mehen, Thomas |
| contents | We compare the relative importance of different mechanisms for polarized $J/ψ$ 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 $J/ψ$, 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 $^3S_1^{[8]}$ matrix element, as well as regimes where photon gluon fusion dominates, suggesting that the gluon TMD parton distribution function can be probed. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_13737 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Polarized $J/ψ$ production in semi-inclusive DIS at large $Q^2$: Comparing quark fragmentation and photon-gluon fusion Copeland, Marston Fleming, Sean Gupta, Rohit Hodges, Reed Mehen, Thomas High Energy Physics - Phenomenology We compare the relative importance of different mechanisms for polarized $J/ψ$ 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 $J/ψ$, 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 $^3S_1^{[8]}$ matrix element, as well as regimes where photon gluon fusion dominates, suggesting that the gluon TMD parton distribution function can be probed. |
| title | Polarized $J/ψ$ production in semi-inclusive DIS at large $Q^2$: Comparing quark fragmentation and photon-gluon fusion |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2310.13737 |