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Lattice QCD at maximal twist
R. Frezzotti, G. C. Rossi
In this review we discuss the general features of maximally twisted lattice QCD. In particular, we illustrate how automatic O(a) improvement can be achieved and how it is possible…
Cutoff effects in maximally twisted LQCD
Giancarlo Rossi, Roberto Frezzotti, Guido Martinelli +1
The Symanzik analysis of correlators in lattice QCD with maximally twisted Wilson fermions reveals that there exist cutoff artifacts which tend to become large as the quark mass ge…
Four quark operators in maximally twisted Wilson LQCD
Roberto Frezzotti, Giancarlo Rossi
We discuss how the peculiar properties of maximally twisted Wilson fermions can be exploited to set up a consistent LQCD computational scheme in which the CP-conserving matrix elem…
A (P)HMC algorithm for N_f = 2 + 1 + 1 flavours of twisted mass fermions
T. Chiarappa, R. Frezzotti, C. Urbach
We present a detailed design of a (P)HMC simulation algorithm for N_f = 2 + 1 + 1 maximally twisted Wilson quark flavours. The algorithm retains even/odd and mass-shift preconditio…
Chirally improving Wilson fermions III. The Schrödinger functional
Roberto Frezzotti, Giancarlo Rossi
We show that it is possible to construct a lattice Schroedinger functional for standard Wilson fermions, where the expectation values of -even operators are O() impr…
Reducing cutoff effects in maximally twisted lattice QCD close to the chiral limit
R. Frezzotti, G. Martinelli, M. Papinutto +1
When analyzed in terms of the Symanzik expansion, lattice correlators of multi-local (gauge-invariant) operators with non-trivial continuum limit exhibit in maximally twisted latti…