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| Format: | Preprint |
| Veröffentlicht: |
2025
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| Online-Zugang: | https://arxiv.org/abs/2509.18892 |
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| _version_ | 1866914097756372992 |
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| author | Cao, Qing-Hong Yu, Zhite Yuan, C. -P. Zhang, Shutao Zhu, Hua Xing |
| author_facet | Cao, Qing-Hong Yu, Zhite Yuan, C. -P. Zhang, Shutao Zhu, Hua Xing |
| contents | We initiate a systematic study of fragmentation energy correlators (FECs), which generalize traditional fragmentation functions and encode non-perturbative information about transverse dynamics in parton fragmentation processes. We define boost-invariant, non-perturbative FECs and derive a corresponding collinear factorization formula. A spin decomposition of the FECs is carried out, analogous to that of transverse-momentum-dependent fragmentation functions. In this work we focus particularly on the Collins-type quark FEC, which is sensitive to chiral symmetry breaking and characterizes the azimuthal asymmetry in the fragmentation of a transversely polarized quark. We perform a next-to-leading-order calculation of the corresponding hard coefficient in semi-inclusive deep-inelastic scattering for the quark non-singlet component, thereby validating the consistency of our theoretical framework. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_18892 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Collins-type fragmentation energy correlator in semi-inclusive deep inelastic lepton-hadron scattering Cao, Qing-Hong Yu, Zhite Yuan, C. -P. Zhang, Shutao Zhu, Hua Xing High Energy Physics - Phenomenology We initiate a systematic study of fragmentation energy correlators (FECs), which generalize traditional fragmentation functions and encode non-perturbative information about transverse dynamics in parton fragmentation processes. We define boost-invariant, non-perturbative FECs and derive a corresponding collinear factorization formula. A spin decomposition of the FECs is carried out, analogous to that of transverse-momentum-dependent fragmentation functions. In this work we focus particularly on the Collins-type quark FEC, which is sensitive to chiral symmetry breaking and characterizes the azimuthal asymmetry in the fragmentation of a transversely polarized quark. We perform a next-to-leading-order calculation of the corresponding hard coefficient in semi-inclusive deep-inelastic scattering for the quark non-singlet component, thereby validating the consistency of our theoretical framework. |
| title | Collins-type fragmentation energy correlator in semi-inclusive deep inelastic lepton-hadron scattering |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2509.18892 |