167 citations · 676 across the 24 of their papers we have counts for
24 papers
Nonperturbative running of the quark mass for QCD from the chirally rotated Schrödinger Functional
Isabel Campos Plasencia, Mattia Dalla Brida, Giulia Maria de Divitiis +4
We study the Renormalisation Group (RG) running of the quark mass, for QCD with Wilson fermions in a mixed action setup, with standard Schrödinger Functional (SF) boundary…
Quark mass RG-running for =3 QCD in a setup
Isabel Campos Plasencia, Mattia Dalla Brida, Giulia Maria de Divitiis +4
We compute the nonperturbative quark mass RG-running in the range for massless QCD with a mixed action approach: sea quarks are regular…
Renormalization improvement of the tensor operator for QCD in a SF setup
Isabel Campos Plasencia, Mattia Dalla Brida, Giulia Maria de Divitiis +4
We present preliminary results of the non-perturbative renormalization group (RG) running of the flavor non-singlet tensor operator. We employ the SF scheme for QCD usin…
Testing a non-perturbative mechanism for elementary fermion mass generation: lattice setup
Stefano Capitani, Giulia Maria de Divitiis, Petros Dimopoulos +7
In this contribution we lay down a lattice setup that allows for the non-perturbative study of a field theoretical model where a SU(2) fermion doublet, subjected to non-Abelian gau…
Testing a non-perturbative mechanism for elementary fermion mass generation: numerical results
Stefano Capitani, Giulia Maria de Divitiis, Petros Dimopoulos +7
Based on a recent proposal according to which elementary particle masses could be generated by a non-perturbative dynamical phenomenon, alternative to the Higgs mechanism, we carry…
Check of a new non-perturbative mechanism for elementary fermion mass generation
Stefano Capitani, Giulia Maria De Divitiis, Petros Dimopoulos +8
We consider a field theoretical model where a SU(2) fermion doublet, subjected to non-Abelian gauge interactions, is also coupled to a complex scalar field doublet via a Yukawa and…
Leading isospin breaking effects on the lattice
G. M. de Divitiis, R. Frezzotti, V. Lubicz +6
We present a method to evaluate on the lattice the leading isospin breaking effects due to both the small mass difference between the up and down quarks and the QED interaction. Ou…
On the extraction of zero momentum form factors on the lattice
G. M. de Divitiis, R. Petronzio, N. Tantalo
We propose a method to expand correlation functions with respect to the spatial components of external momenta. From the coefficients of the expansion it is possible to extract Lor…
Lattice QCD calculation of strong isospin breaking effects
G. M. de Divitiis, P. Dimopoulos, R. Frezzotti +8
We present a new method to evaluate with high precision the isospin breaking effects due to the mass difference between the up and down quarks using lattice QCD. Our proposal is ap…
Isospin breaking effects due to the up-down mass difference in Lattice QCD
G. M. de Divitiis, P. Dimopoulos, R. Frezzotti +8
We present a new method to evaluate with high precision isospin breaking effects due to the small mass difference between the up and down quarks using lattice QCD. Our proposal is…
Distance preconditioning for lattice Dirac operators
G. M. de Divitiis, R. Petronzio, N. Tantalo
We propose a preconditioning of the Dirac operator based on the factorisation of a predefined function related to the decay of the propagator with the distance. We show that it can…
Heavy--light decay constants in the continuum limit of quenched lattice QCD
G. M. de Divitiis, M. Guagnelli, F. Palombi +2
We compute the decay constants for the heavy--light pseudoscalar mesons in the quenched approximation and continuum limit of lattice QCD. Within the Schrodinger Functional framewor…
Heavy quark masses in the continuum limit of quenched Lattice QCD
G. M. de Divitiis, M. Guagnelli, F. Palombi +2
We compute charm and bottom quark masses in the quenched approximation and in the continuum limit of lattice QCD. We make use of a step scaling method, previously introduced to dea…
Towards a lattice determination of the coupling
G. M. de Divitiis, L. Del Debbio, M. Di Pierro +4
The coupling is related to the form factor at zero momentum of the axial current between - and -states. This form factor is evaluated on the lattice usi…
Non-perturbative renormalization constants on the lattice from flavour non-singlet Ward identities
G. M. de Divitiis, R. Petronzio
By imposing axial and vector Ward identities for flavour-non-singlet currents, we estimate in the quenched approximation the non-perturbative values of combinations of improvement…
QCD at finite temperature and partially negative flavour numbers
G. M. de Divitiis, R. Frezzotti, M. Masetti +1
We study dynamical fermion effects in lattice QCD at finite temperature. The method adopted is basically the extrapolation from negative flavour numbers already tested at zero temp…
Dynamical flavour dependence of static heavy meson decay constants on the lattice
G. M. de Divitiis, R. Frezzotti, M. Masetti +1
We study the dynamical flavour dependence of the lattice estimates of the heavy meson decay constant in the static limit. We perform the analysis by considering negative flavour nu…
Pseudofermion observables for static heavy meson decay constants on the lattice
G. M. de Divitiis, R. Frezzotti, M. Masetti +1
A method based on the Monte Carlo inversion of the Dirac operator on the lattice provides low noise results for the correlations entering the definition of the heavy meson decay co…
Light meson decay constants beyond the quenched approximation
G. M. de Divitiis, R. Frezzotti, M. Guagnelli +2
We calculate the effects of including dynamical fermion loops in the lattice QCD estimates of meson decay constants, by extrapolating the results from negative flavour numbers afte…
The bermions: an approach to lattice QCD dynamical fermions from negative flavour numbers
G. M. de Divitiis, R. Frezzotti, M. Guagnelli +2
We estimate the effects of dynamical fermions by extrapolating to positive flavour numbers the results from negative values obtained by adding to the pure gauge sector a fermion ac…
Smeared propagators for lattice hadron spectroscopy
G. M. de Divitiis, R. Frezzotti, M. Guagnelli +2
We propose to replace ordinary propagators in lattice operator correlations entering the determination of hadron masses with space-time smeared propagators. These are defined as th…
Universality and the approach to the continuum limit in lattice gauge theory
G. de Divitiis, R. Frezzotti, M. Guagnelli +5
The universality of the continuum limit and the applicability of renormalized perturbation theory are tested in the SU(2) lattice gauge theory by computing two different non-pertur…
Non perturbative determination of the running coupling constant in quenched SU(2)
G. M. de Divitiis, R. Frezzotti, M. Guagnelli +1
Through a finite size renormalization group technique we calculate the running coupling constant for quenched SU(2) with a few percent error over a range of energy varying by a fac…
A definition of the running coupling constant in a twisted SU(2) lattice gauge theory
G. M. de Divitiis, R. Frezzotti, M. Guagnelli +1
We propose a definition of the running coupling constant in a SU(2) lattice gauge theory with twisted boundary conditions. It is based on the correlation of Polyakov loops extended…