UNICA IRIS Institutional Research Information System
IRIS è il sistema di gestione integrata dei dati della ricerca (persone, progetti, pubblicazioni, attività) adottato dall'Università degli Studi di Cagliari dal mese di luglio 2015.
EnglishRecent measurements for F(2)(x,Q(2)) have been analyzed in terms of the "dynamical" and "standard" parton model approach at next-to-leading order (NLO) and next-to-next-to-leading order (NNLO) of perturbative QCD. Having fixed the relevant NLO and NNLO parton distributions, we present the implications and predictions for the longitudinal structure function F(L)(x,Q(2)). It is shown that the previously noted extreme perturbative NNLO/NLO instability of F(L)(x,Q(2)) is an artifact of the commonly utilized "standard" gluon distributions. In particular it is demonstrated that using the appropriate-dynamically generated-parton distributions at NLO and NNLO, F(L)(x,Q(2)) turns out to be perturbatively rather stable already for Q(2)>= O(2-3 GeV(2)).
Scheda prodotto non validato
Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo
| Titolo: | Dynamical next-to-next-to-leading order parton distributions and the perturbative stability of F(L)(x,Q(2)) |
| Autori: | |
| Data di pubblicazione: | 2008 |
| Rivista: | |
| Abstract: | Recent measurements for F(2)(x,Q(2)) have been analyzed in terms of the "dynamical" and "standard" parton model approach at next-to-leading order (NLO) and next-to-next-to-leading order (NNLO) of perturbative QCD. Having fixed the relevant NLO and NNLO parton distributions, we present the implications and predictions for the longitudinal structure function F(L)(x,Q(2)). It is shown that the previously noted extreme perturbative NNLO/NLO instability of F(L)(x,Q(2)) is an artifact of the commonly utilized "standard" gluon distributions. In particular it is demonstrated that using the appropriate-dynamically generated-parton distributions at NLO and NNLO, F(L)(x,Q(2)) turns out to be perturbatively rather stable already for Q(2)>= O(2-3 GeV(2)). |
| Handle: | http://hdl.handle.net/11584/76256 |
| Tipologia: | 1.1 Articolo in rivista |
File in questo prodotto:
http://hdl.handle.net/11584/76256
Copyright © 2020