Please use this identifier to cite or link to this item:
http://hdl.handle.net/2307/375
DC Field | Value | Language |
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dc.contributor.author | Blossier, B. | - |
dc.contributor.author | Boucaud, Ph. | - |
dc.contributor.author | Dimopoulos, P. | - |
dc.contributor.author | Farchioni, F. | - |
dc.contributor.author | Frezzotti, R. | - |
dc.contributor.author | Gimenez, V. | - |
dc.contributor.author | Herdoiza, G. | - |
dc.contributor.author | Jansen, K. | - |
dc.contributor.author | Lubicz, Vittorio | - |
dc.contributor.author | Michael, C. | - |
dc.contributor.author | Palao, D. | - |
dc.contributor.author | Papinutto, M. | - |
dc.contributor.author | Shindler, A. | - |
dc.contributor.author | Simula, Silvano | - |
dc.contributor.author | Tarantino, C. | - |
dc.contributor.author | Urbach, C. | - |
dc.contributor.author | Wenger, U. | - |
dc.date.accessioned | 2010-07-28T15:32:18Z | - |
dc.date.available | 2010-07-28T15:32:18Z | - |
dc.date.issued | 2008-04-07 | - |
dc.identifier.uri | http://hdl.handle.net/2307/375 | - |
dc.description.abstract | We present the results of a lattice QCD calculation of the average up-down and strange quark masses and of the light meson pseudoscalar decay constants with Nf=2 dynamical fermions. The simulation is carried out at a single value of the lattice spacing with the twisted mass fermionic action at maximal twist, which guarantees automatic O(a)-improvement of the physical quantities. Quark masses are renormalized by implementing the non perturbative RI-MOM renormalization procedure. Our results for the light quark masses are mud(MSbar,2 GeV) = 3.85 ± 0.12 ± 0.40 MeV, ms(MSbar,2 GeV) = 105 ± 3 ± 9 MeV and ms/mud = 27.3 ± 0.3 ± 1.2. We also obtain fK = 161.7 ± 1.2 ± 3.1 MeV and the ratio fK/fπ = 1.227 ± 0.009 ± 0.024. From this ratio, by using the experimental determination of Γ(K → μbar nuμ(γ))/Γ(π → μbar nuμ(γ)) and the average value of |Vud| from nuclear beta decays, we obtain |Vus| = 0.2192(5)(45), in agreement with the determination from Kl3 decays and the unitarity constraint. | en |
dc.language.iso | en | en |
dc.publisher | Institute of Physics Publishing | en |
dc.relation.ispartof | Journal of High Energy Physics | en |
dc.rights | IOP Publishing | en |
dc.subject | Lattice QCD | en |
dc.subject | Weak Decays | en |
dc.subject | Kaon Physics | en |
dc.subject | Quark Masses | en |
dc.subject | Standard Model parameters | en |
dc.title | Light quark masses and pseudoscalar decay constants from Nf=2 lattice QCD with twisted mass fermions | en |
dc.type | Article | en |
dc.subject.miur | Settori Disciplinari MIUR::Scienze fisiche::FISICA TEORICA, MODELLI E METODI MATEMATICI | en |
dc.subject.miur | Scienze fisiche | - |
dc.subject.isicrui | Categorie ISI-CRUI::Scienze fisiche::Physics | en |
dc.subject.isicrui | Scienze fisiche | - |
dc.subject.anagraferoma3 | Scienze fisiche | en |
dc.relation.pagenumber | 020 | en |
dc.identifier.doi | 10.1088/1126-6708/2008/04/020 | - |
dc.relation.issuenumber | 04 | en |
dc.description.romatrecurrent | Dipartimento di Fisica 'Edoardo Amaldi' | * |
item.grantfulltext | restricted | - |
item.fulltext | With Fulltext | - |
item.languageiso639-1 | other | - |
Appears in Collections: | A - Articolo su rivista X_Dipartimento di Fisica 'Edoardo Amaldi' |
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60_jhep04(2008)020.pdf | solo archivio | 323.71 kB | Adobe PDF | Request a copy |
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