Calculations of high-energy processes involving the production of b-quarks are typically performed in two different ways, the massive four-flavour scheme (4FS) and the massless five-flavour scheme (5FS). For processes where the combination of the 4FS and 5FS results into a matched calculation is technically difficult, it is possible to define a hybrid scheme known as the doped scheme, where above the b-quark threshold the strong coupling runs with nf=5, as in the massless calculation, while the DGLAP splitting functions are those of the nf=4 scheme. In this contribution we present NNPDF3.0 PDF sets in this doped scheme, compare them with the corresponding 4FS and 5FS sets, and discuss their relevance for LHC phenomenology.
Doped Parton Distributions / V. Bertone, S. Carrazza, J. Rojo. - (2015 Sep 24). ((Intervento presentato al 27. convegno Rencontres de Blois on Particle Physics and Cosmology tenutosi a Blois nel 2015.
|Titolo:||Doped Parton Distributions|
|Parole Chiave:||High Energy Physics - Phenomenology (hep-ph); High Energy Physics - Experiment (hep-ex)|
|Settore Scientifico Disciplinare:||Settore FIS/02 - Fisica Teorica, Modelli e Metodi Matematici|
|Data di pubblicazione:||2015-09-24|
|Appare nelle tipologie:||24 - Pre-print|