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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2508.00814 |
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| _version_ | 1866911214859190272 |
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| author | Copeland, Marston Dai, Lin Fu, Yu Roy, Jyotirmoy |
| author_facet | Copeland, Marston Dai, Lin Fu, Yu Roy, Jyotirmoy |
| contents | Based on recent data from LHCb, we study $ψ(2S)$ production in jets using non-relativistic QCD (NRQCD) in conjunction with the Fragmenting Jet Function (FJF) and Gluon Fragmentation Improved Pythia (GFIP) formalisms. Similar to previous studies of $J/ψ$ production in jets, our results show that these formalisms offer a much better description of data than the default Pythia+NRQCD prediction. We compare and contrast the predictions from the FJF formalism and the GFIP approach. In addition, our results show that the distribution of $ψ(2S)$ in jets is an excellent discriminator to test different predictions for the $ψ(2S)$ LDMEs from various extractions. We find a large disparity between the predictions from three different collaborations, showing that a more precise extraction of the $ψ(2S)$ LDMEs may be necessary. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_00814 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | $ψ(2S)$ production in jets using NRQCD Copeland, Marston Dai, Lin Fu, Yu Roy, Jyotirmoy High Energy Physics - Phenomenology Nuclear Theory Based on recent data from LHCb, we study $ψ(2S)$ production in jets using non-relativistic QCD (NRQCD) in conjunction with the Fragmenting Jet Function (FJF) and Gluon Fragmentation Improved Pythia (GFIP) formalisms. Similar to previous studies of $J/ψ$ production in jets, our results show that these formalisms offer a much better description of data than the default Pythia+NRQCD prediction. We compare and contrast the predictions from the FJF formalism and the GFIP approach. In addition, our results show that the distribution of $ψ(2S)$ in jets is an excellent discriminator to test different predictions for the $ψ(2S)$ LDMEs from various extractions. We find a large disparity between the predictions from three different collaborations, showing that a more precise extraction of the $ψ(2S)$ LDMEs may be necessary. |
| title | $ψ(2S)$ production in jets using NRQCD |
| topic | High Energy Physics - Phenomenology Nuclear Theory |
| url | https://arxiv.org/abs/2508.00814 |