出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We summarise status and recent results of the European Twisted Mass collaboration (ETMC).
The collaboration has been generating gauge configurations for three different values of the lattice
spacing a . 0.1 fm and values of the charged pseudo scalar mass as low as 300 MeV with two
flavours of maximally twisted mass quarks. We provide evidence that O(a) improvement works
very well with maximally twisted mass fermions and that also higher order lattice artifacts appear
to be small. The currently only quantity in the light meson and baryon sector where cut-off effects
are visible is the neutral pseudo scalar mass and we present an attempt to understand this from a
theoretical point of view.
We describe finite size effects and quark mass dependence of the mass and decay constant of the
(charged) pseudo scalar meson with chiral perturbation theory formulae and our current estimate
for the low energy constants `¯3,4 is `¯3 =3.44(8)(35) and `¯4 =4.61(4)(11). Results for the average
up-down, the strange and the charm quark mass and the chiral condensate are also presented.
