PDF bias and flavor dependence in TMD distributions
Abstract Transverse momentum dependent (TMD) distributions match collinear parton density functions (PDF) in the limit of small transverse distances, which is accounted for by global extractions of TMD distributions. We study the influence of the collinear PDF value and uncertainties on the determin...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2022-10-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP10(2022)118 |
| _version_ | 1828218050894102528 |
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| author | Marcin Bury Francesco Hautmann Sergio Leal-Gomez Ignazio Scimemi Alexey Vladimirov Pia Zurita |
| author_facet | Marcin Bury Francesco Hautmann Sergio Leal-Gomez Ignazio Scimemi Alexey Vladimirov Pia Zurita |
| author_sort | Marcin Bury |
| collection | DOAJ |
| description | Abstract Transverse momentum dependent (TMD) distributions match collinear parton density functions (PDF) in the limit of small transverse distances, which is accounted for by global extractions of TMD distributions. We study the influence of the collinear PDF value and uncertainties on the determination of unpolarized TMD distributions and the description of Drell-Yan (DY) and Z-boson production measurements at low transverse momenta. We take into account, for the first time in fits including TMD evolution, flavor-dependent non-perturbative TMD profiles. We carry out a Bayesian analysis to incorporate the propagation of PDF uncertainties into TMD extractions. We find that collinear PDF uncertainties and non-perturbative TMD flavor dependence are both essential to obtain reliable TMD determinations, and should be included in future global analyses. |
| first_indexed | 2024-04-12T15:56:39Z |
| format | Article |
| id | doaj.art-eb6d680e459f46dfb0f8fa33d1b8e37d |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-04-12T15:56:39Z |
| publishDate | 2022-10-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-eb6d680e459f46dfb0f8fa33d1b8e37d2022-12-22T03:26:21ZengSpringerOpenJournal of High Energy Physics1029-84792022-10-0120221013410.1007/JHEP10(2022)118PDF bias and flavor dependence in TMD distributionsMarcin Bury0Francesco Hautmann1Sergio Leal-Gomez2Ignazio Scimemi3Alexey Vladimirov4Pia Zurita5Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of SciencesCERN, Theory DepartmentWien Universität, Faculty of PhysicsDpto. de Física Teórica & IPARCOS, Universidad Complutense de MadridDpto. de Física Teórica & IPARCOS, Universidad Complutense de MadridInstitut für Theoretische Physik, Universität RegensburgAbstract Transverse momentum dependent (TMD) distributions match collinear parton density functions (PDF) in the limit of small transverse distances, which is accounted for by global extractions of TMD distributions. We study the influence of the collinear PDF value and uncertainties on the determination of unpolarized TMD distributions and the description of Drell-Yan (DY) and Z-boson production measurements at low transverse momenta. We take into account, for the first time in fits including TMD evolution, flavor-dependent non-perturbative TMD profiles. We carry out a Bayesian analysis to incorporate the propagation of PDF uncertainties into TMD extractions. We find that collinear PDF uncertainties and non-perturbative TMD flavor dependence are both essential to obtain reliable TMD determinations, and should be included in future global analyses.https://doi.org/10.1007/JHEP10(2022)118Parton DistributionsResummationFactorizationRenormalization Group |
| spellingShingle | Marcin Bury Francesco Hautmann Sergio Leal-Gomez Ignazio Scimemi Alexey Vladimirov Pia Zurita PDF bias and flavor dependence in TMD distributions Journal of High Energy Physics Parton Distributions Resummation Factorization Renormalization Group |
| title | PDF bias and flavor dependence in TMD distributions |
| title_full | PDF bias and flavor dependence in TMD distributions |
| title_fullStr | PDF bias and flavor dependence in TMD distributions |
| title_full_unstemmed | PDF bias and flavor dependence in TMD distributions |
| title_short | PDF bias and flavor dependence in TMD distributions |
| title_sort | pdf bias and flavor dependence in tmd distributions |
| topic | Parton Distributions Resummation Factorization Renormalization Group |
| url | https://doi.org/10.1007/JHEP10(2022)118 |
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