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

2017/04/30 by Constantia Alexandrou, Christos Kallidonis · 1 citation
Physics and Astronomy · #hep-lat

paper · pdf · doi:10.1103/physrevd.96.034511

published as Phys. Rev. D 96, 034511 (2017) · arXiv admin note: text overlap with arXiv:1406.4310

arxiv created 2017/09/29 · arxiv updated 2017/10/03

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 Ξ_cc^*, as well as of the doubly and triply charmed Ωs that have not yet been determined experimentally.

Citations

• Baryon spectrum with N_f=2+1+1 twisted mass fermions

Cited by

• Observation of the doubly-charmed-baryon decay \it Ξ_cc⁺⁺→\it Ξ_c⁰π⁺π⁺