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Now showing items 1-9 of 9

#### The anomalous magnetic moment of the muon in the Standard Model

(Elsevier, 2020-08-14)

We review the present status of the Standard Model calculation of the anomalous magnetic moment of the muon. This is performed in a perturbative expansion in the fine-structure constant $\alpha$ and is broken down into ...

#### Baryon spectrum with $N_f=2+1+1$ twisted mass fermions

(2014-06-17)

The masses of the low lying baryons are evaluated using a total of ten ensembles of dynamical twisted mass fermion gauge configurations. The simulations are performed using two degenerate flavors of light quarks, and a ...

#### Strange and charm baryon masses with two flavors of dynamical twisted mass fermions

(2012-05-31)

The masses of the low-lying strange and charm baryons are evaluated using two degenerate flavors of twisted mass sea quarks for pion masses in the range of about 260 MeV to 450 MeV. The strange and charm valence quark ...

#### Nucleon form factors and moments of generalized parton distributions using $N_f=2+1+1$ twisted mass fermions

(2013-03-24)

We present results on the axial and the electromagnetic form factors of the nucleon, as well as, on the first moments of the nucleon generalized parton distributions using maximally twisted mass fermions. We analyze two ...

#### Evaluation of disconnected quark loops for hadron structure using GPUs

(2013-09-09)

A number of stochastic methods developed for the calculation of fermion loops are investigated and compared, in particular with respect to their efficiency when implemented on Graphics Processing Units (GPUs). We assess ...

#### Disconnected quark loop contributions to nucleon observables in lattice QCD

(2013-10-23)

We perform a high statistics calculation of disconnected fermion loops on Graphics Processing Units for a range of nucleon matrix elements extracted using lattice QCD. The isoscalar electromagnetic and axial vector form ...

#### Nucleon Structure using lattice QCD

(2013-03-27)

A review of recent nucleon structure calculations within lattice QCD is presented. The nucleon excited states, the axial charge, the isovector momentum fraction and helicity distribution are discussed, assessing the methods ...

#### Nucleon generalized form factors with twisted mass fermions

(2013-12-10)

We present results on the nucleon form factors, momentum fraction and helicity moment for $N_f=2$ and $N_f=2+1+1$ twisted mass fermions for a number of lattice volumes and lattice spacings. First results for a new $N_f=2$ ...

#### Baryon masses with dynamical twisted mass fermions

(2007-10-05)

We present results on the mass of the nucleon and the $\Delta$ using two dynamical degenerate twisted mass quarks. The evaluation is performed at four quark masses corresponding to a pion mass in the range of 690-300 MeV ...