Fantômas4QCD: pion PDFs with epistemic uncertainties
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2024
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866913458519277568 |
|---|---|
| author | Courtoy, Aurore Kotz, Lucas Nadolsky, Pavel Olness, Fred Ponce-Chavez, Maximiliano |
| author_facet | Courtoy, Aurore Kotz, Lucas Nadolsky, Pavel Olness, Fred Ponce-Chavez, Maximiliano |
| contents | In these proceedings, we reiterate and extend the discussion of the Next-to-Leading Order (NLO) QCD analysis of the charged pion Parton Distribution Function (PDF) obtained within the Fantômas4QCD framework. The goal of the Fantômas analysis is to quantify the dependence on the parametrization form in global QCD analyses, with a first application to the pion PDFs. We highlight the anti-correlation between the experimentally allowed gluon and sea distributions in the pion, as made apparent by the sampling over parametrization forms. This result, for the sea and gluon sector, illustrates the importance of accounting for epistemic uncertainties in data-driven QCD analyses. In that regard, we further discuss the meaning of the sampling uncertainty and why it is key in phenomenological studies of hadron structure. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_02189 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Fantômas4QCD: pion PDFs with epistemic uncertainties Courtoy, Aurore Kotz, Lucas Nadolsky, Pavel Olness, Fred Ponce-Chavez, Maximiliano High Energy Physics - Phenomenology In these proceedings, we reiterate and extend the discussion of the Next-to-Leading Order (NLO) QCD analysis of the charged pion Parton Distribution Function (PDF) obtained within the Fantômas4QCD framework. The goal of the Fantômas analysis is to quantify the dependence on the parametrization form in global QCD analyses, with a first application to the pion PDFs. We highlight the anti-correlation between the experimentally allowed gluon and sea distributions in the pion, as made apparent by the sampling over parametrization forms. This result, for the sea and gluon sector, illustrates the importance of accounting for epistemic uncertainties in data-driven QCD analyses. In that regard, we further discuss the meaning of the sampling uncertainty and why it is key in phenomenological studies of hadron structure. |
| title | Fantômas4QCD: pion PDFs with epistemic uncertainties |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2408.02189 |