Zobrazeno 1 - 10
of 1 247
pro vyhledávání: '"Capitani S"'
Autor:
Capitani, S., Della Morte, M., Djukanovic, D., von Hippel, G., Hua, J., Jäger, B., Knippschild, B., Meyer, H. B., Rae, T. D., Wittig, H.
Publikováno v:
Phys. Rev. D 92, 054511 (2015)
We present results for the nucleon electromagnetic form factors, including the momentum transfer dependence and derived quantities (charge radii and magnetic moment). The analysis is performed using O(a) improved Wilson fermions in Nf=2 QCD measured
Externí odkaz:
http://arxiv.org/abs/1504.04628
Autor:
Junnarkar, P. M., Capitani, S., Djukanovic, D., von Hippel, G., Hua, J., Jäger, B., Meyer, H. B., Rae, T. D., Wittig, H.
Publikováno v:
PoS(LATTICE2014)150
We present preliminary results on the axial form factor $G_A(Q^2)$ and the induced pseudoscalar form factor $G_P(Q^2)$ of the nucleon. A systematic analysis of the excited-state contributions to form factors is performed on the CLS ensemble `N6' with
Externí odkaz:
http://arxiv.org/abs/1411.5828
Autor:
von Hippel, G. M., Capitani, S., Djukanovic, D., Hua, J., Jäger, B., Junnarkar, P., Meyer, H. B., Rae, T. D., Wittig, H.
Publikováno v:
PoS(LATTICE2014)147
We study the ability of a variety of fitting techniques to extract the ground state matrix elements of the vector current from ratios of nucleon three- and two-point functions that contain contaminations from excited states. Extending our high-statis
Externí odkaz:
http://arxiv.org/abs/1411.4804
Autor:
Jäger, B., Rae, T. D., Capitani, S., Della Morte, M., Djukanovic, D., von Hippel, G., Knippschild, B., Meyer, H. B., Wittig, H.
We present updated results for the nucleon axial charge and electromagnetic (EM) form factors, which include a significant increase in statistics for all ensembles (up to 4000 measurements), as well as the addition of ensembles with pion masses down
Externí odkaz:
http://arxiv.org/abs/1311.5804
Autor:
Capitani, S., Della Morte, M., von Hippel, G., Jäger, B., Jüttner, A., Knippschild, B., Meyer, H. B., Wittig, H.
Publikováno v:
Phys. Rev. D 86, 074502 (2012)
We report on our calculation of the nucleon axial charge gA in QCD with two flavours of dynamical quarks. A detailed investigation of systematic errors is performed, with a particular focus on contributions from excited states to three-point correlat
Externí odkaz:
http://arxiv.org/abs/1205.0180
Autor:
Brandt, B. B., Capitani, S., Della Morte, M., Djukanovic, D., Gegelia, J., von Hippel, G., Juttner, A., Knippschild, B., Meyer, H. B., Wittig, H.
Publikováno v:
Eur.Phys.J.ST 198:79-94,2011
Lattice simulations of QCD have produced precise estimates for the masses of the lowest-lying hadrons which show excellent agreement with experiment. By contrast, lattice results for the vector and axial vector form factors of the nucleon show signif
Externí odkaz:
http://arxiv.org/abs/1106.1554
Autor:
Brandt, B. B., Capitani, S., Della Morte, M., Djukanovic, D., von Hippel, G., Jäger, B., Jüttner, A., Knippschild, B., Wittig, H.
Publikováno v:
PoS Lattice2010:164,2010
We present an update on our on-going project to compute hadronic observables for Nf=2 flavours of O(a) improved Wilson fermions at small lattice spacings. The procedure to determine the lattice scale via the mass of the Omega baryon is described. Fur
Externí odkaz:
http://arxiv.org/abs/1010.2390
Autor:
Capitani, S., Della Morte, M., Endress, E., Juttner, A., Knippschild, B., Wittig, H., Zambrana, M.
Publikováno v:
PoS LAT2009:095,2009
We report on our on-going project to compute mesonic and baryonic two- and three-point correlation functions in simulations using Nf=2 flavours of O(a) improved Wilson quarks and the Wilson plaquette action. We present performance figures for the DD-
Externí odkaz:
http://arxiv.org/abs/0910.5578
Publikováno v:
Phys.Lett. B639 (2006) 520-526
We present a first Wilson twisted mass fermion calculation of the matrix element between pion states of the twist-2 operator, which is related to the the lowest moment < x > of the valence quark parton distribution function in a pion. Using Wilson tw
Externí odkaz:
http://arxiv.org/abs/hep-lat/0511013
Publikováno v:
PoS LAT2005 (2005) 341
We show at the example of the matrix element between pion states of a twist-2, non-singlet operator that Wilson twisted mass fermions allow to compute this phenomenologically relevant quantitiy at small pseudo scalar masses of O(270 MeV). In the quen
Externí odkaz:
http://arxiv.org/abs/hep-lat/0510023