Low lying baryon spectrum with $N_f = 2+1+1$ dynamical twisted quarks

Understand

We present first results on the octet and decuplet strange baryon spectrum with $N_f=2+1+1$ twisted mass quarks.

• We use an Osterwalder Seiler valence strange quark with a mass tuned to the kaon and compare the results with those obtained in the unitary setup.
• This comparison allows to perform a first study of the lattice artefacts introduced by the mixed action approach.
• We investigate the effect of the strange and charm quarks in the sea by using two lattice spacings and comparing with preceding $N_f = 2$ twisted mass fermion calculations.