NAGIOS: RODERIC FUNCIONANDO

Light quark masses and pseudoscalar decay constants from N(f)=2 Lattice QCD with twisted mass fermions

Repositori DSpace/Manakin

Valencià Castellano

Inici
Investigació
e-prints
22 - Física
Visualitza element

IMPORTANT: Aquest repositori està en una versió antiga des del 3/12/2023. La nova instal.lació está en https://roderic.uv.es/

Light quark masses and pseudoscalar decay constants from N(f)=2 Lattice QCD with twisted mass fermions

Mostra el registre parcial de l'element

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	Giménez Gómez, Vicente
dc.contributor.author	Herdoiza, G.
dc.contributor.author	Jansen, K.
dc.contributor.author	Lubicz, V.
dc.contributor.author	Michael, C.
dc.contributor.author	Palao Palomares, David
dc.contributor.author	Papinutto, Mauro
dc.contributor.author	Shindler, A.
dc.contributor.author	Simula, S.
dc.contributor.author	Tarantino, C.
dc.contributor.author	Urbach, C.
dc.contributor.author	Wenger, U.
dc.date.accessioned	2014-09-24T11:43:48Z
dc.date.available	2014-09-24T11:43:48Z
dc.date.issued	2008
dc.identifier.citation	Blossier, B. Boucaud, Ph. Dimopoulos, P. Farchioni, F. Frezzotti, R. Giménez Gómez, Vicente Herdoiza, G. Jansen, K. Lubicz, V. Michael, C. Palao Palomares, David Papinutto, Mauro Shindler, A. Simula, S. Tarantino, C. Urbach, C. Wenger, U. 2008 Light quark masses and pseudoscalar decay constants from N(f)=2 Lattice QCD with twisted mass fermions Journal of High Energy Physics 2008 4 020-1 020-23
dc.identifier.uri	http://hdl.handle.net/10550/38957
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 N-f = 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 m(ud)((MS) over bar) (2 GeV) = 3.85 +/- 0.12 +/- 0.40MeV, m(s)((MS) over bar) ( 2 GeV) = 105 +/- 3 +/- 9MeV and m(s)/m(ud) = 27.3 +/- 0.3 +/- 1.2. We also obtain f(K) = 161.7 +/- 1.2 +/- 3.1MeV and the ratio f(K)/f(pi) = 1.227 +/- 0.009 +/- 0.024. From this ratio, by using the experimental determination of Gamma(K -> mu(nu) over bar (mu)(gamma))/ Gamma(pi -> mu(nu) over bar (mu)(gamma)) and the average value of vertical bar V-ud vertical bar from nuclear beta decays, we obtain vertical bar V-us vertical bar = 0.2192( 5)( 45), in agreement with the determination from K-l3 decays and the unitarity constraint.
dc.language.iso	eng
dc.relation.ispartof	Journal of High Energy Physics, 2008, vol. 2008, num. 4, p. 020-1-020-23
dc.subject	Física
dc.title	Light quark masses and pseudoscalar decay constants from N(f)=2 Lattice QCD with twisted mass fermions
dc.type	journal article	es_ES
dc.date.updated	2014-09-24T11:43:48Z
dc.identifier.doi	10.1088/1126-6708/2008/04/020
dc.identifier.idgrec	041517
dc.rights.accessRights	open access	es_ES