Browsing by Author "Korzec, T."

Article

Axial nucleon form factors from lattice QCD

Alexandrou, Constantia; Brinet, M.; Carbonell, J.; Constantinou, Martha; Harraud, P. A.; Guichon, P.; Jansen, K.; Korzec, T.; Papinutto, M. (2011)

We present results on the nucleon axial form factors within lattice QCD using two flavors of degenerate twisted mass fermions. Volume effects are examined using simulations at two volumes of spatial length L=2.1fm and ...

Article

Determination of the Δ(1232) axial and pseudoscalar form factors from lattice QCD

Alexandrou, Constantia; Gregory, E. B.; Korzec, T.; Koutsou, Giannis; Negele, J. W.; Sato, T.; Tsapalis, Antonios (2013)

We present a lattice QCD calculation of the Δ(1232) matrix elements of the axial-vector and pseudoscalar currents. The decomposition of these matrix elements into the appropriate Lorentz invariant form factors is carried ...

Article

Electromagnetic form factors of the Ω- In lattice QCD

Alexandrou, Constantia; Korzec, T.; Koutsou, Giannis; Negele, J. W.; Proestos, Y. (2010)

We present results on the omega baryon (Ω-) electromagnetic form factors using Nf=2+1 domain-wall fermion configurations for three pion masses in the range of about 350 to 300 MeV. We compare results obtained using domain-wall ...

Article

Light baryon masses with dynamical twisted mass fermions

Alexandrou, Constantia; Baron, R.; Blossier, B.; Brinet, M.; Carbonell, J.; Dimopoulos, Petros; Drach, V.; Farchioni, F.; Frezzotti, R.; Guichon, P.; Herdoiza, G.; Jansen, K.; Korzec, T.; Koutsou, Giannis; Liu, Z.; Michael, C.; Pène, O.; Shindler, A.; Urbach, C.; Wenger, U. (2008)

We present results on the mass of the nucleon and the Δ using two dynamical degenerate twisted mass quarks and the tree-level Symanzik improved gauge action. The evaluation is performed at four quark masses corresponding ...

Article

Low-lying baryon spectrum with two dynamical twisted mass fermions

Alexandrou, Constantia; Baron, R.; Carbonell, J.; Drach, V.; Guichon, P.; Jansen, K.; Korzec, T.; Pène, O. (2009)

The masses of the low-lying baryons are evaluated using two degenerate flavors of twisted mass sea quarks corresponding to pseudoscalar masses in the range of about 270-500 MeV. The strange valence quark mass is tuned to ...

Article

Moments of nucleon generalized parton distributions from lattice QCD

Alexandrou, Constantia; Carbonell, J.; Constantinou, Martha; Harraud, P. A.; Guichon, P.; Jansen, K.; Kallidonis, Christos; Korzec, T.; Papinutto, M. (2011)

We present results on the lower moments of the nucleon generalized parton distributions within lattice QCD using two dynamical flavors of degenerate twisted mass fermions. Our simulations are performed on lattices with ...

Article

Nucleon electromagnetic form factors in twisted mass lattice QCD

Alexandrou, Constantia; Brinet, M.; Carbonell, J.; Constantinou, Martha; Harraud, P. A.; Guichon, P.; Jansen, K.; Korzec, T.; Papinutto, M. (2011)

We present results on the nucleon electromagnetic form factors within lattice QCD using two flavors of degenerate twisted mass fermions. Volume effects are examined using simulations at two volumes of spatial length L=2.1fm ...

Article

Nucleon excited states in N f = 2 lattice QCD

Alexandrou, Constantia; Korzec, T.; Koutsou, Giannis; Leontiou, Theodoros (2014)

We investigate the excited states of the nucleon using Nf=2 twisted mass gauge configurations with pion masses in the range of about 270 to 450 MeV and one ensemble of Nf=2 Clover fermions at almost physical pion mass. We ...

Conference Object

Nucleon form factors with NF=2 twisted mass fermions

Guichon, P.; Baron, R.; Alexandrou, Constantia; Korzec, T.; Koutsou, Giannis; Brinet, M.; Carbonell, J.; Harraud, P. -A; Jansen, K. (2010)

We present results on the nucleon form factors using two degenerate flavors of twisted mass fermions on 243×48 and 32×64 lattices with pion masses in the range 290÷485MeV. © 2010 American Institute of Physics.

Article

Quark transverse charge densities in the Δ (1232) from lattice QCD

Alexandrou, Constantia; Korzec, T.; Koutsou, Giannis; Lorcé, C.; Negele, J. W.; Pascalutsa, V.; Tsapalis, Antonios; Vanderhaeghen, M. (2009)

We extend the formalism relating electromagnetic form factors to transverse quark charge densities in the light-front frame to the case of a spin-3/2 baryon and calculate these transverse densities for the Δ (1232) isobar ...

Article

Renormalization constants for 2-twist operators in twisted mass QCD

Alexandrou, Constantia; Constantinou, Martha; Korzec, T.; Panagopoulos, Haralambos G.; Stylianou, Fotos S. (2011)

Perturbative and nonperturbative results on the renormalization constants of the fermion field and the twist-2 fermion bilinears are presented with emphasis on the nonperturbative evaluation of the one-derivative twist-2 ...

Article

Renormalization constants of local operators for Wilson type improved fermions

Alexandrou, Constantia; Constantinou, Martha; Korzec, T.; Panagopoulos, Haralambos G.; Stylianou, Fotos S. (2012)

Perturbative and nonperturbative results are presented on the renormalization constants of the quark field and the vector, axial-vector, pseudoscalar, scalar, and tensor currents. The perturbative computation, carried out ...

Article

Δ(1232) axial charge and form factors from lattice QCD

Alexandrou, Constantia; Gregory, E. B.; Korzec, T.; Koutsou, Giannis; Negele, J. W.; Sato, T.; Tsapalis, Antonios (2011)

We present the first calculation on the Δ axial vector and pseudoscalar form factors using lattice QCD. Two Goldberger-Treiman relations are derived and examined. A combined chiral fit is performed to the nucleon axial ...

Article

Δ-baryon electromagnetic form factors in lattice QCD

Alexandrou, Constantia; Korzec, T.; Koutsou, Giannis; Leontiou, Theodoros; Lorcé, C.; Negele, J. W.; Pascalutsa, V.; Tsapalis, Antonios; Vanderhaeghen, M. (2009)

We develop techniques to calculate the four Δ electromagnetic form factors using lattice QCD, with particular emphasis on the subdominant electric quadrupole form factor that probes deformation of the Δ. Results are presented ...