Decay constants of pseudoscalar D-mesons in lattice QCD with domain-wall fermion

Autor: Wen-Ping Chen, Yu-Chih Chen, Ting-Wai Chiu, Han-Yi Chou, Tian-Shin Guu, Tung-Han Hsieh
Jazyk: angličtina
Rok vydání: 2014
Předmět:
Zdroj: Physics Letters B, Vol 736, Iss C, Pp 231-236 (2014)
Druh dokumentu: article
ISSN: 0370-2693
1873-2445
DOI: 10.1016/j.physletb.2014.07.025
Popis: We present the first study of the masses and decay constants of the pseudoscalar D mesons in two flavors lattice QCD with domain-wall fermion. The gauge ensembles are generated on the 243×48 lattice with the extent Ns=16 in the fifth dimension, and the plaquette gauge action at β=6.10, for three sea-quark masses with corresponding pion masses in the range 260–475 MeV. We compute the point-to-point quark propagators, and measure the time-correlation functions of the pseudoscalar and vector mesons. The inverse lattice spacing is determined by the Wilson flow, while the strange and the charm quark masses by the masses of the vector mesons ϕ(1020) and J/ψ(3097) respectively. Using heavy meson chiral perturbation theory (HMChPT) to extrapolate to the physical pion mass, we obtain fD=202.3(2.2)(2.6) MeV and fDs=258.7(1.1)(2.9) MeV.
Databáze: Directory of Open Access Journals
Externí odkaz: