63 citations · 235 across the 19 of their papers we have counts for
21 papers
Heavy Wilson Quarks and O() Improvement: Nonperturbative Results for
Mattia Dalla Brida, Roman Höllwieser, Francesco Knechtli +3
With Wilson quarks, on-shell O() improvement of the lattice QCD action is achieved by including the Sheikholeslami-Wohlert term and two further operators of mass dimension 5, wh…
A non-perturbative determination of
Mattia Dalla Brida, Roman Höllwieser, Francesco Knechtli +4
Close to the continuum limit, lattice QCD with mass-degenerate Wilson quarks can be described by Symanzik's effective continuum action, which contains the dimension 5 operator, $m\…
Progresses on high-temperature QCD: Equation of State and energy-momentum tensor
Matteo Bresciani, Mattia Dalla Brida, Leonardo Giusti +1
We present first non-perturbative results for the renormalization constants of the QCD energy-momentum tensor, based on the framework of thermal QCD with shifted and twisted (for q…
Determination of by the non-perturbative decoupling method
Mattia Dalla Brida, Roman Höllwieser, Francesco Knechtli +5
We present the details and first results of a new strategy for the determination of . By simultaneously decoupling 3 fictitious heavy quarks we establish a relation betwe…
Computation of QCD meson screening masses at high temperature
Davide Laudicina, Mattia Dalla Brida, Leonardo Giusti +2
We compute flavor non-singlet meson screening masses in the chiral limit of QCD with quarks. The calculation is carried out at 12 temperatures from GeV up to t…
Multi-level computation of the hadronic vacuum polarization contribution to
Leonardo Giusti, Mattia Dalla Brida, Tim Harris +1
The first results from the Fermilab E989 experiment have confirmed the long-standing tension between the experimental determination of the muon anomalous magnetic moment $a_μ=(g_μ-…
Non-perturbative thermal QCD at all temperatures: the case of mesonic screening masses
Mattia Dalla Brida, Leonardo Giusti, Tim Harris +2
We present a strategy based on the step-scaling technique to study non-perturbatively thermal QCD up to very high temperatures. As a first concrete application, we compute the flav…
Lattice QCD investigation of the structure of the meson
Constantia Alexandrou, Joshua Berlin, Mattia Dalla Brida +3
We investigate the quark content of the scalar meson using lattice QCD. To this end we consider correlation functions of six different two- and four-quark interpolating…
Investigation of New Methods for Numerical Stochastic Perturbation Theory in Theory
Mattia Dalla Brida, Marco Garofalo, A. D. Kennedy
Numerical stochastic perturbation theory is a powerful tool for estimating high-order perturbative expansions in lattice field theory. The standard algorithms based on the Langevin…
SMD-based numerical stochastic perturbation theory
Mattia Dalla Brida, Martin Lüscher
The viability of a variant of numerical stochastic perturbation theory, where the Langevin equation is replaced by the SMD algorithm, is examined. In particular, the convergence of…
Investigating efficient methods for computing four-quark correlation functions
Abdou Abdel-Rehim, Constantia Alexandrou, Joshua Berlin +3
We discuss and compare the efficiency of various methods, combinations of point-to-all propagators, stochastic timeslice-to-all propagators, the one-end trick and sequential propag…
Importance of closed quark loops for lattice QCD studies of tetraquarks
Joshua Berlin, Abdou Abdel-Rehim, Constantia Alexandrou +5
To investigate the light scalar tetraquark candidate (quantum numbers ), a correlation matrix including a variety of two- and four-quark interpolating operator…
The determination of by the ALPHA collaboration
Mattia Bruno, Mattia Dalla Brida, Patrick Fritzsch +6
We review the ALPHA collaboration strategy for obtaining the QCD coupling at high scale. In the three-flavor effective theory it avoids the use of perturbation theory at a…
Slow running of the Gradient Flow coupling from 200 MeV to 4 GeV in QCD
Mattia Dalla Brida, Patrick Fritzsch, Tomasz Korzec +3
Using a finite volume Gradient Flow (GF) renormalization scheme with Schrödinger Functional (SF) boundary conditions, we compute the non-perturbative running coupling in the range…
Determination of the QCD -parameter and the accuracy of perturbation theory at high energies
Mattia Dalla Brida, Patrick Fritzsch, Tomasz Korzec +3
We discuss the determination of the strong coupling or equivalently the QCD -parameter. Its determination requires the use of perturb…
The chirally rotated Schrödinger functional: theoretical expectations and perturbative tests
Mattia Dalla Brida, Stefan Sint, Pol Vilaseca
The chirally rotated Schrödinger functional (SF) with massless Wilson-type fermions provides an alternative lattice regularization of the Schrödinger functional (SF), with diffe…
Computation of correlation matrices for tetraquark candidates with and flavor structure
Joshua Berlin, Abdou Abdel-Rehim, Constantia Alexandrou +3
The conjecture that several recently observed mesons have a structure, which is not dominated by an ordinary quark-antiquark pair, but by a four-quark structure, is being actively…
A dynamical study of the chirally rotated Schrödinger functional in QCD
Mattia Dalla Brida, Stefan Sint
The chirally rotated Schrödinger functional for Wilson-fermions allows for finite-volume, mass-independent renormalization schemes compatible with automatic O() improvement. So…
Towards a new determination of the QCD Lambda parameter from running couplings in the three-flavour theory
M. Dalla Brida, P. Fritzsch, T. Korzec +3
We review our new strategy and current status towards a high precision computation of the Lambda parameter from three-flavour simulations in QCD. To reach this goal we combine spec…
Numerical Stochastic Perturbation Theory and the Gradient Flow
Mattia Dalla Brida, Dirk Hesse
We study the Yang-Mills gradient flow using numerical stochastic perturbation theory. As an application of the method we consider the recently proposed gradient flow coupling in th…
Scalar mesons and tetraquarks by means of lattice QCD
Marc Wagner, Constantia Alexandrou, Jan Oliver Daldrop +5
We study the light scalar mesons a_0(980) and kappa using N_f = 2+1+1 flavor lattice QCD. In order to probe the internal structure of these scalar mesons, and in particular to iden…