English

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

High Energy Physics - Lattice 2017-10-03 v2

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)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 Nf=2+1+1N_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 Ξcc\Xi_{cc}^*, as well as of the doubly and triply charmed Ω\Omegas that have not yet been determined experimentally.

Keywords

Cite

@article{arxiv.1704.02647,
  title  = {Low-lying baryon masses using $N_f=2$ twisted mass clover-improved fermions directly at the physical point},
  author = {Constantia Alexandrou and Christos Kallidonis},
  journal= {arXiv preprint arXiv:1704.02647},
  year   = {2017}
}

Comments

arXiv admin note: text overlap with arXiv:1406.4310