Christos Kallidonis

Baryon spectrum with

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 a charm quark fixed to approximately their physical values. The light sea quarks correspond to pseudo scalar masses in the range of about 210 to 430 MeV. We use the Iwasaki improved gluonic action at three values of the coupling constant corresponding to lattice spacing

N_f = 2 + 1 + 1

a=0.094

twisted mass fermions

, 0.082 and 0.065 fm determined from the nucleon mass. We check for both finite volume and cutoff effects on the baryon masses. We examine the issue of isospin symmetry breaking for the octet and decuplet baryons and its dependence on the lattice spacing. We show that in the continuum limit isospin breaking is consistent with zero, as expected. We performed a chiral extrapolation of the forty baryon masses using SU(2)

Nucleon form factors and moments of generalized parton distributions using

\ensuremath{\chi}\mathrm{PT}

N_f=2+1+1

. After taking the continuum limit and extrapolating to the physical pion mass our results are in good agreement with experiment. We provide predictions for the mass of the doubly charmed

twisted mass fermions

{\mathrm{\ensuremath{\Xi}}}_{cc}^{*}

First physics results at the physical pion mass from N f = 2 Wilson twisted mass fermions at maximal twist

, as well as of the doubly and triply charmed

Nucleon Axial Form Factors Using

\mathrm{\ensuremath{\Omega}}

N_f = 2

s that have not yet been determined experimentally.

twisted mass fermions with a physical value of the pion mass

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 N_f=2+1+1 ensembles having pion masses of 210 MeV and 354 MeV at two values of the lattice spacing. The lattice scale is determined using the nucleon mass computed on a total of 18 N_f=2+1+1 ensembles generated at three values of the lattice spacing,