We construct a set of parton distribution functions (PDFs) in which fixed-order NLO and NNLO calculations are supplemented with soft-gluon (threshold) resummation up to NLL and NNLL accuracy respectively, suitable for use in conjunction with any QCD calculation in which threshold resummation is included at the level of partonic cross sections. These resummed PDF sets, based on the NNPDF3.0 analysis, are extracted from deep-inelastic scattering, Drell-Yan, and top quark pair production data, for which resummed calculations can be consistently used. We find that, close to threshold, the inclusion of resummed PDFs can partially compensate the enhancement in resummed matrix elements, leading to resummed hadronic cross-sections closer to the fixed-order calculations. On the other hand, far from threshold, resummed PDFs reduce to their fixed-order counterparts. Our results demonstrate the need for a consistent use of resummed PDFs in resummed calculations.

Bonvini, M., Marzani, S., Rojo, J., Rottoli, L., Ubiali, M., Ball, R., et al. (2015). Parton distributions with threshold resummation. JOURNAL OF HIGH ENERGY PHYSICS, 2015(9), 1-45 [10.1007/JHEP09(2015)191].

Parton distributions with threshold resummation

Rottoli, L;
2015

Abstract

We construct a set of parton distribution functions (PDFs) in which fixed-order NLO and NNLO calculations are supplemented with soft-gluon (threshold) resummation up to NLL and NNLL accuracy respectively, suitable for use in conjunction with any QCD calculation in which threshold resummation is included at the level of partonic cross sections. These resummed PDF sets, based on the NNPDF3.0 analysis, are extracted from deep-inelastic scattering, Drell-Yan, and top quark pair production data, for which resummed calculations can be consistently used. We find that, close to threshold, the inclusion of resummed PDFs can partially compensate the enhancement in resummed matrix elements, leading to resummed hadronic cross-sections closer to the fixed-order calculations. On the other hand, far from threshold, resummed PDFs reduce to their fixed-order counterparts. Our results demonstrate the need for a consistent use of resummed PDFs in resummed calculations.
Articolo in rivista - Articolo scientifico
Scientifica
Deep Inelastic Scattering; QCD; Resummation; Nuclear and High Energy Physics
eng
Bonvini, M., Marzani, S., Rojo, J., Rottoli, L., Ubiali, M., Ball, R., et al. (2015). Parton distributions with threshold resummation. JOURNAL OF HIGH ENERGY PHYSICS, 2015(9), 1-45 [10.1007/JHEP09(2015)191].
Bonvini, M; Marzani, S; Rojo, J; Rottoli, L; Ubiali, M; Ball, R; Bertone, V; Carrazza, S; Hartland, N
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10281/229861
Citazioni
  • Scopus 50
  • ???jsp.display-item.citation.isi??? 41
Social impact