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Resolution to the problem of consistent large transverse momentum in TMDs

Articolo
Data di Pubblicazione:
2023
Abstract:
Parametrizing TMD parton densities and fragmentation functions in ways that consistently match their large transverse-momentum behavior in standard collinear factorization has remained notoriously difficult. We show how the problem is solved in a recently introduced set of steps for combining perturbative and nonperturbative transverse momentum in TMD factorization. Called a “bottom-up” approach in a previous article, here we call it a “hadron structure oriented” (HSO) approach to emphasize its focus on preserving a connection to the TMD parton model interpretation. We show that the associated consistency constraints improve considerably the agreement between parametrizations of TMD functions and their large- � � behavior, as calculated in collinear factorization. The procedure discussed herein will be important for guiding future extractions of TMD parton densities and fragmentation functions and for testing TMD factorization and universality. We illustrate the procedure with an application to semi-inclusive deep inelastic scattering (SIDIS) structure functions at an input scale Q_0 , and we show that there is improved consistency between different methods of calculating at moderate transverse momentum. We end with a discussion of plans for future phenomenological applications.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
factorization: collinear, parton: density, deep inelastic scattering: semi-inclusive reaction, hadron: structure, model: parton transverse momentum dependence, parton: distribution function, fragmentation function, structure function, universality, parametrization, nonperturbative
Elenco autori:
J. O. Gonzalez-Hernandez; T. Rainaldi; T. C. Rogers
Autori di Ateneo:
GONZALEZ HERNANDEZ Jose Osvaldo
Link alla scheda completa:
https://iris.unito.it/handle/2318/1914390
Link al Full Text:
https://iris.unito.it/retrieve/handle/2318/1914390/1158689/PhysRevD.107.094029.pdf
Pubblicato in:
PHYSICAL REVIEW D
Journal
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PE2_2 - Phenomenology of fundamental interactions - (2022)

SCIENZE MATEMATICHE, CHIMICHE, FISICHE - Cosmologia e Universo

SCIENZE MATEMATICHE, CHIMICHE, FISICHE - Fisica delle Particelle e dei Nuclei

SCIENZE MATEMATICHE, CHIMICHE, FISICHE - Laboratori innovativi, strumentazione e modellizzazione fisica
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