Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2006-05-10
Phys.Rev.D74:034501,2006
Physics
High Energy Physics
High Energy Physics - Lattice
18 pages, 5 figures
Scientific paper
10.1103/PhysRevD.74.034501
It has been shown that in the twisted mass formulation of Lattice QCD at maximal twist large cutoff effects are generated when the quark mass becomes of O(a Lambda_QCD^2). In general, these effects can be suppressed in two ways: either by choosing the critical quark mass in an "optimal way", or by adding the Clover term to the twisted action. We investigate the second option by performing a quenched lattice QCD simulation with twisted Clover fermions and pion masses as low as 280 MeV. We show that the Clover term is indeed efficient in reducing the large cutoff effects. In particular, the so-called bending phenomenon observed in the determination of the pion decay constant is cured in this way. In addition, by using maximally twisted Clover fermions, we provide a non-perturbative determination of the vector current renormalization constant Z_V as well as of the non-perturbatively renormalized light quark masses. Finally, we calculate the connected contribution to the charged-neutral pseudoscalar meson mass splitting, finding that the introduction of the Clover term in the twisted action is also beneficial, in the quenched approximation, in reducing cutoff effects related to the isospin symmetry breaking at finite lattice spacing.
Becirevic Damir
Boucaud Ph.
Lubicz Vittorio
Martinelli Gabriele
Mescia Federico
No associations
LandOfFree
Exploring twisted mass Lattice QCD with the Clover term does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Exploring twisted mass Lattice QCD with the Clover term, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exploring twisted mass Lattice QCD with the Clover term will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-705760