Exploring orbital angular momentum and spin-orbit correlation for gluons at the Electron-Ion Collider
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arXiv
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2024
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| author | Bhattacharya, Shohini Boussarie, Renaud Hatta, Yoshitaka |
| author_facet | Bhattacharya, Shohini Boussarie, Renaud Hatta, Yoshitaka |
| contents | In our previous work [Phys. Rev. Lett. 128, 182002 (2022)], we introduced a pioneering observable aimed at experimentally detecting the orbital angular momentum (OAM) of gluons. Our focus was on the longitudinal double spin asymmetry observed in exclusive dijet production during electron-proton scattering. We demonstrated the sensitivity of the $\cos ϕ$ angular correlation between the scattered electron and proton as a probe for gluon OAM at small-$x$ and its intricate interplay with gluon helicity. This current work provides a comprehensive exposition, diving further into the aforementioned calculation with added elaboration and in-depth analysis. We reveal that, in addition to the gluon OAM, one also gains access to the spin-orbit correlation of gluons. We supplement our work with a detailed numerical analysis of our observables for the kinematics of the Electron-Ion Collider. In addition to dijet production, we also consider the recently proposed semi-inclusive diffractive deep inelastic scattering process which potentially offers experimental advantages over dijet measurements. Finally, we investigate quark-channel contributions to these processes and find an unexpected breakdown of collinear factorization. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2404_04209 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Exploring orbital angular momentum and spin-orbit correlation for gluons at the Electron-Ion Collider Bhattacharya, Shohini Boussarie, Renaud Hatta, Yoshitaka High Energy Physics - Phenomenology High Energy Physics - Experiment In our previous work [Phys. Rev. Lett. 128, 182002 (2022)], we introduced a pioneering observable aimed at experimentally detecting the orbital angular momentum (OAM) of gluons. Our focus was on the longitudinal double spin asymmetry observed in exclusive dijet production during electron-proton scattering. We demonstrated the sensitivity of the $\cos ϕ$ angular correlation between the scattered electron and proton as a probe for gluon OAM at small-$x$ and its intricate interplay with gluon helicity. This current work provides a comprehensive exposition, diving further into the aforementioned calculation with added elaboration and in-depth analysis. We reveal that, in addition to the gluon OAM, one also gains access to the spin-orbit correlation of gluons. We supplement our work with a detailed numerical analysis of our observables for the kinematics of the Electron-Ion Collider. In addition to dijet production, we also consider the recently proposed semi-inclusive diffractive deep inelastic scattering process which potentially offers experimental advantages over dijet measurements. Finally, we investigate quark-channel contributions to these processes and find an unexpected breakdown of collinear factorization. |
| title | Exploring orbital angular momentum and spin-orbit correlation for gluons at the Electron-Ion Collider |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2404.04209 |