Zobrazeno 1 - 10
of 83
pro vyhledávání: '"Knippschild, B."'
Autor:
Liu, L., Bacchio, S., Dimopoulos, P., Finkenrath, J., Frezzotti, R., Helmes, C., Jost, C., Knippschild, B., Kostrzewa, B., Liu, H., Ottnad, K., Petschlies, M., Urbach, C., Werner, M.
We present results for the isospin-0 $\pi\pi$ s-wave scattering length calculated in twisted mass lattice QCD. We use three $N_f = 2$ ensembles with unitary pion mass at its physical value, 240~MeV and 330~MeV respectively. We also use a large set of
Externí odkaz:
http://arxiv.org/abs/1701.08961
Autor:
Liu, L., Bacchio, S., Dimopoulos, P., Finkenrath, J., Frezzotti, R., Helmes, C., Jost, C., Knippschild, B., Kostrzewa, B., Liu, H., Ottnad, K., Petschlies, M., Urbach, C., Werner, M.
Publikováno v:
Phys. Rev. D 96, 054516 (2017)
We present results for the isospin-0 $\pi\pi$ s-wave scattering length calculated with Osterwalder-Seiler valence quarks on Wilson twisted mass gauge configurations. We use three $N_f = 2$ ensembles with unitary (valence) pion mass at its physical va
Externí odkaz:
http://arxiv.org/abs/1612.02061
We present first results on the $\rho$ resonance parameters obtained with $N_f=2+1+1$ Wilson twisted mass fermions at maximal twist. Using ensembles of the ETM collaboration, we provide results for two values of the lattice spacing and a range of pio
Externí odkaz:
http://arxiv.org/abs/1512.00282
Autor:
ETM Collaboration, Abdel-Rehim, A., Alexandrou, C., Burger, F., Constantinou, M., Dimopoulos, P., Frezzotti, R., Hadjiyiannakou, K., Helmes, C., Jansen, K., Kallidonis, C. Jost. C., Knippschild, B., Kostrzewa, B., Koutsou, G., Liu, L., Mangin-Brinet, M., Ottnad, K., Petschlies, M., Pientka, G., Rossi, G. C., Urbach, C., Wenger, U., Werner, M.
Publikováno v:
Phys. Rev. D 95, 094515 (2017)
We present physics results from simulations of QCD using $N_f = 2$ dynamical Wilson twisted mass fermions at the physical value of the pion mass. These simulations were enabled by the addition of the clover term to the twisted mass quark action. We s
Externí odkaz:
http://arxiv.org/abs/1507.05068
Autor:
Helmes, C., Jost, C., Knippschild, B., Liu, C., Liu, J., Liu, L., Urbach, C., Ueding, M., Wang, Z., Werner, M.
We present results for the $I=2$ $\pi\pi$ scattering length using $N_f=2+1+1$ twisted mass lattice QCD for three values of the lattice spacing and a range of pion mass values. Due to the use of Laplacian Heaviside smearing our statistical errors are
Externí odkaz:
http://arxiv.org/abs/1506.00408
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:
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