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- Stephan Dürr, G. Koutsou
- Physical review letters
- 2012

We determine the quark mass ratio m(c)/m(s) on the lattice, using Wilson-type fermions. Configurations with N(f)=2 dynamical clover-improved fermions by the QCDSF Collaboration are used, which were made available through the ILDG. In the valence sector we use a sophisticated, mass-independently O(a)-improved Wilson-type action with small cutoff effects even… (More)

- Marc Wagner, Abdou Abdel-Rehim, +5 authors Carsten Urbach
- 2013

We review the status of an ongoing long-term lattice investigation of the spectrum and structure of tetraquark candidates. We focus on the light scalar meson a0(980). First steps regarding the study of a possibly existing ccc̄c̄ tetraquark are also outlined.

- Constantia Alexandrou, M. Constantinou, +5 authors A. Vaquero
- Computer Physics Communications
- 2014

- Constantia Alexandrou, Tomasz, +6 authors Tomasz Korzec
- 2008

The electromagnetic and axial form factors of the nucleon are evaluated in twisted mass QCD with two degenerate flavors of light, dynamical quarks. The axial charge g A , magnetic moment and the Dirac and Pauli radii are determined for pion masses in the range 300 MeV to 500 MeV.

- Constantia Alexandrou, Tomasz Korzec, +8 authors Carsten Urbach
- 2007

We present results on the mass of the nucleon and the ∆ using two dynamical degenerate twisted mass quarks. The evaluation is performed at four quark masses corresponding to a pion mass in the range of 690-300 MeV on lattices of size 2.1 fm and 2.7 fm. We check for cutoff effects by evaluating these baryon masses on lattices of spatial size 2.1 fm with… (More)

- Marc Wagner, Abdou Abdel-Rehim, +5 authors Carsten Urbach
- 2013

We discuss the techniques to extract the electromagnetic ∆ form factors in Lattice QCD. We evaluate these form factors using dynamical fermions with smallest pion mass of about 350 MeV. We pay particular attention to the extraction of the electric quadrupole form factor that signals a deformation of the ∆. The magnetic moment of the ∆ is extrapolated using… (More)

- Vincent Drach, Mariane Brinet, +10 authors Carsten Urbach
- 2008

We present results on the mass of the baryon octet and decuplet using two flavors of light dynamical twisted mass fermions. The strange quark mass is fixed to its physical value from the kaon sector in a partially quenched set up. Calculations are performed for light quark masses corresponding to a pion mass in the range 270-500 MeV and lattice sizes of 2.1… (More)

Citation Alexandrou, C. et al. " Nucleon to Delta Transition Form Factors with NF=2+1 Domain Wall Fermions. Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access… (More)

- Vincent Drach, Mariane Brinet, +10 authors Carsten Urbach
- 2008

We present results on the mass of the baryon octet and decuplet using two flavors of light dynamical twisted mass fermions. The strange quark mass is fixed to its physical value from the kaon sector in a partially quenched set up. Calculations are performed for light quark masses corresponding to a pion mass in the range 270-500 MeV and lattice sizes of 2.1… (More)