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| 001 | 860341 | ||
| 005 | 20200914094709.0 | ||
| 024 | 7 | _ | |a 10.1016/S0370-2693(96)80015-3 |2 doi |
| 024 | 7 | _ | |a 0370-2693 |2 ISSN |
| 024 | 7 | _ | |a 1873-2445 |2 ISSN |
| 037 | _ | _ | |a FZJ-2019-01116 |
| 082 | _ | _ | |a 530 |
| 100 | 1 | _ | |a Eicker, N. |0 P:(DE-Juel1)132090 |b 0 |u fzj |
| 245 | _ | _ | |a Evaluating sea quark contributions to flavour-singlet operators in lattice QCD |
| 260 | _ | _ | |a Amsterdam |c 1996 |b North-Holland Publ. |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 336 | 7 | _ | |a Journal Article |0 0 |2 EndNote |
| 520 | _ | _ | |a In a full QCD lattice study with Nf = 2 Wilson fermions, we seek to optimize the signals for the disconnected contributions to the matrix element of flavour-singlet operators between nucleon states, which are indicative for sea quark effects. We demonstrate, in form of a fluctuation analysis to the noisy estimator technique, that — in order to achieve a tolerable signal to noise-ratio in full QCD — it is advantageous to work with a Z2-noise source rather than to rely only on gauge invariance to cancel non-gauge-invariant background. In the case of the πNσ-term, we find that 10 Z2-noise sources suffice on our sample (about 150 independent QCD configurations at β = 5.6 on 163 × 32 withκsea = 0.157, equivalent to Mπ/Mϱ = 0.76 (1), to achieve decent signals and adequate fluctuations, rather than 300 such sources as recently used in quenched simulations. |
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| 700 | 1 | _ | |a Glässner, U. |0 P:(DE-HGF)0 |b 1 |
| 700 | 1 | _ | |a Güsken, S. |0 P:(DE-HGF)0 |b 2 |
| 700 | 1 | _ | |a Hoeber, H. |0 P:(DE-HGF)0 |b 3 |
| 700 | 1 | _ | |a Lippert, T. |0 P:(DE-Juel1)132179 |b 4 |u fzj |
| 700 | 1 | _ | |a Ritzenhöfer, G. |0 P:(DE-HGF)0 |b 5 |
| 700 | 1 | _ | |a Schilling, K. |0 P:(DE-HGF)0 |b 6 |
| 700 | 1 | _ | |a Siegert, G. |0 P:(DE-HGF)0 |b 7 |
| 700 | 1 | _ | |a Spitz, A. |0 P:(DE-HGF)0 |b 8 |
| 700 | 1 | _ | |a Ueberholz, P. |0 P:(DE-HGF)0 |b 9 |
| 700 | 1 | _ | |a Viehoff, J. |0 P:(DE-HGF)0 |b 10 |
| 773 | _ | _ | |a 10.1016/S0370-2693(96)80015-3 |g Vol. 389, no. 4, p. 720 - 726 |0 PERI:(DE-600)1466612-1 |n 4 |p 720 - 726 |t Physics letters / B B |v 389 |y 1996 |x 0370-2693 |
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