On the resolution of the sign of gluon polarization in the proton
Fuente:
arXiv
Guardado en:
| Autores principales: | , , , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2024
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866929275793309696 |
|---|---|
| author | Hunt-Smith, N. T. Cocuzza, C. Melnitchouk, W. Sato, N. Thomas, A. W White, M. J. |
| author_facet | Hunt-Smith, N. T. Cocuzza, C. Melnitchouk, W. Sato, N. Thomas, A. W White, M. J. |
| contents | Recently the possible existence of negative gluon helicity, $Δg$, has been observed to be compatible with existing empirical constraints, including from jet production in polarized proton-proton collisions at RHIC, and lattice QCD data on polarized gluon Ioffe time distributions. We perform a new global analysis of polarized parton distributions in the proton with new constraints from the high-$x$ region of deep-inelastic scattering (DIS). A dramatic reduction in the quality of the fit for the negative $Δg$ replicas compared to those with positive $Δg$ suggest that the negative $Δg$ solution cannot simultaneously account for high-$x$ polarized DIS data along with lattice and polarized jet data. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_08117 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | On the resolution of the sign of gluon polarization in the proton Hunt-Smith, N. T. Cocuzza, C. Melnitchouk, W. Sato, N. Thomas, A. W White, M. J. High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Lattice Nuclear Theory Recently the possible existence of negative gluon helicity, $Δg$, has been observed to be compatible with existing empirical constraints, including from jet production in polarized proton-proton collisions at RHIC, and lattice QCD data on polarized gluon Ioffe time distributions. We perform a new global analysis of polarized parton distributions in the proton with new constraints from the high-$x$ region of deep-inelastic scattering (DIS). A dramatic reduction in the quality of the fit for the negative $Δg$ replicas compared to those with positive $Δg$ suggest that the negative $Δg$ solution cannot simultaneously account for high-$x$ polarized DIS data along with lattice and polarized jet data. |
| title | On the resolution of the sign of gluon polarization in the proton |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Lattice Nuclear Theory |
| url | https://arxiv.org/abs/2403.08117 |