Zobrazeno 1 - 10
of 188
pro vyhledávání: '"Najjar, J"'
Autor:
Horsley, R., Najjar, J., Nakamura, Y., Perlt, H., Pleiter, D., Rakow, P. E. L., Schierholz, G., Schiller, A., Stüben, H., Zanotti, J. M.
Publikováno v:
Phys.Rev. D 92 (2015) 1, 018502
In this Reply, we respond to the above Comment. Our computation [Phys. Rev. D 91 (2015) 074512] only took into account pure QCD effects, arising from quark mass differences, so it is not surprising that there are discrepancies in isospin splittings a
Externí odkaz:
http://arxiv.org/abs/1507.07825
Autor:
Horsley, R., Najjar, J., Nakamura, Y., Perlt, H., Pleiter, D., Rakow, P. E. L., Schierholz, G., Schiller, A., Stüben, H., Zanotti, J. M.
SU2 isospin breaking effects in baryon octet (and decuplet) masses are due to a combination of up and down quark mass differences and electromagnetic effects. These mass differences are small. Between the Sigma and Lambda the mass splitting is much l
Externí odkaz:
http://arxiv.org/abs/1412.0970
Autor:
Horsley, R., Najjar, J., Nakamura, Y., Perlt, H., Pleiter, D., Rakow, P. E. L., Schierholz, G., Schiller, A., Stüben, H., Zanotti, J. M.
Publikováno v:
Phys. Rev. D 91, 074512 (2015)
Isospin breaking effects in baryon octet (and decuplet) masses are due to a combination of up and down quark mass differences and electromagnetic effects and lead to small mass splittings. Between the Sigma and Lambda this mass splitting is much larg
Externí odkaz:
http://arxiv.org/abs/1411.7665
Autor:
Bali, G. S., Collins, S., Gläßle, B., Göckeler, M., Najjar, J., Rödl, R., Schäfer, A., Schiel, R., Söldner, W., Sternbeck, A., Wein, P.
Publikováno v:
PoS(Lattice 2013)291
We present new N_f=2 data for the nucleon generalized form factors, varying volume, lattice spacing and pion mass, down to 150 MeV. We also give an update of our direct calculation of the nucleon sigma term for a range of pion mass values including t
Externí odkaz:
http://arxiv.org/abs/1312.0828
Autor:
Bali, G., Collins, S., Glässle, B., Göckeler, M., Javadi-Motaghi, N., Najjar, J., Söldner, W., Sternbeck, A.
Publikováno v:
PoS(LATTICE 2013)447
We report on the lowest moment of parton distribution functions and generalized form factors for the pion at several values of the momentum transfer. Calculations are performed for N_f=2 flavors of O(a) improved Wilson fermions with pion masses down
Externí odkaz:
http://arxiv.org/abs/1311.7639
Autor:
Bali, G. S., Collins, S., Gläßle, B., Göckeler, M., Najjar, J., Rödl, R., Schäfer, A., Schiel, R., Sternbeck, A., Söldner, W.
We report on our on-going study of the lower moments of iso-vector polarised and unpolarised structure functions, $g_A$ and $\langle x\rangle_{u-d}$, respectively, and the iso-vector scalar and tensor charge, for $N_f=2$ non-perturbatively improved c
Externí odkaz:
http://arxiv.org/abs/1311.7041
Autor:
Horsley, R., Najjar, J., Nakamura, Y., Perlt, H., Pleiter, D., Rakow, P. E. L., Schierholz, G., Schiller, A., Stüben, H., Zanotti, J. M.
Publikováno v:
PoS(LATTICE 2013)249
By extending the SU(3) flavour symmetry breaking expansion from up, down and strange sea quark masses to partially quenched valence quark masses we propose a method to determine charmed quark hadron masses including possible QCD isospin breaking effe
Externí odkaz:
http://arxiv.org/abs/1311.5010
Autor:
Horsley, R., Najjar, J., Nakamura, Y., Pleiter, D., Rakow, P. E. L., Schierholz, G., Zanotti, J. M.
Publikováno v:
PoS(Lattice 2012)135
Using an SU(3) flavour symmetry breaking expansion in the quark mass, we determine the QCD component of the neutron-proton, Sigma and Xi mass splittings of the baryon octet due to up-down (and strange) quark mass differences. Provided the average qua
Externí odkaz:
http://arxiv.org/abs/1212.5507
Autor:
Bali, G. S., Bruns, P. C., Collins, S., Deka, M., Gläßle, B., Göckeler, M., Greil, L., Hemmert, T. R., Horsley, R., Najjar, J., Nakamura, Y., Nobile, A., Pleiter, D., Rakow, P. E. L., Schäfer, A., Schiel, R., Schierholz, G., Sternbeck, A., Zanotti, J.
Publikováno v:
Nucl. Phys. B866 (2013) 1-25
We analyze Nf=2 nucleon mass data with respect to their dependence on the pion mass down to mpi = 157 MeV and compare it with predictions from covariant baryon chiral perturbation theory (BChPT). A novel feature of our approach is that we fit the nuc
Externí odkaz:
http://arxiv.org/abs/1206.7034
Autor:
Horsley, R., Najjar, J., Nakamura, Y., Pleiter, D., Rakow, P. E. L., Schierholz, G., Zanotti, J. M.
Publikováno v:
Phys. Rev. D 86 (2012) 114511
Using an SU(3) flavour symmetry breaking expansion in the quark mass, we determine the QCD component of the nucleon, Sigma and Xi mass splittings of the baryon octet due to up-down (and strange) quark mass differences in terms of the kaon mass splitt
Externí odkaz:
http://arxiv.org/abs/1206.3156