# Low-lying baryon masses using $N_f=2$ twisted mass clover-improved fermions directly at the physical point

## TL;DR

This study computes low-lying baryon masses using $N_f=2$ twisted mass fermions at the physical pion mass, achieving results consistent with experiments and predicting masses for yet-undetermined doubly and triply charmed baryons.

## Contribution

It introduces a $N_f=2$ twisted mass clover-improved fermion ensemble directly at the physical point, reducing isospin breaking and providing new baryon mass predictions.

## Key findings

- Hyperon and charmed baryon masses agree with experimental data.
- Clover term reduces isospin symmetry breaking.
- Predictions made for unmeasured doubly and triply charmed baryons.

## Abstract

The masses of the low-lying baryons are evaluated using an ensemble with two degenerate light twisted mass clover-improved quarks with mass tuned to reproduce the physical pion mass. The Iwasaki improved gluonic action is employed. The coupling constant value corresponds to a lattice spacing of $a=0.0938(3)(2)$ fm, determined from the nucleon mass. We find that the clover term supresses isospin symmetry breaking as compared to our previous results using $N_f=2+1+1$ twisted mass fermions. The masses of the hyperons and charmed baryons evaluated using this ensemble are in agreement with the experimental values. We provide predictions for the mass of the doubly charmed $\Xi_{cc}^*$, as well as of the doubly and triply charmed $\Omega$s that have not yet been determined experimentally.