Aubin C, Bernard C, Detar C, Di Pierro M, Freeland E D, Gottlieb Steven, Heller U M, Hetrick J E, El-Khadra A X, Kronfeld A S, Levkova L, Mackenzie P B, Menscher D, Maresca F, Nobes M, Okamoto M, Renner D, Simone J, Sugar R, Toussaint D, Trottier H D
Physics Department, Columbia University, New York, New York 10027, USA.
Phys Rev Lett. 2005 Sep 16;95(12):122002. doi: 10.1103/PhysRevLett.95.122002. Epub 2005 Sep 14.
We present the first lattice QCD calculation with realistic sea quark content of the D+-meson decay constant f(D+). We use the MILC Collaboration's publicly available ensembles of lattice gauge fields, which have a quark sea with two flavors (up and down) much lighter than a third (strange). We obtain f(D+)=201+/-3+/-17 MeV, where the errors are statistical and a combination of systematic errors. We also obtain f(Ds)=249+/-3+/-16 MeV for the Ds meson.
我们展示了首次针对(D^+)介子衰变常数(f(D^+))进行的具有现实海夸克含量的格点量子色动力学计算。我们使用了米尔克合作组公开提供的格点规范场系综，其中具有两种味道（上夸克和下夸克）的夸克海比第三种味道（奇夸克）轻得多。我们得到(f(D^+)=201\pm3\pm17)兆电子伏特，其中误差分别为统计误差和系统误差的综合。我们还得到(D_s)介子的(f(D_s)=249\pm3\pm16)兆电子伏特。
