Struckmann, T. et al. (2001) Flavor singlet pseudoscalar masses in Nf=2 QCD. Physical Review D, 63(7), 074503. (doi: 10.1103/PhysRevD.63.074503)
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Publisher's URL: http://dx.doi.org/10.1103/PhysRevD.63.074503
Abstract
We perform a lattice mass analysis in the flavor singlet pseudoscalar channel on the SESAM and TχL full QCD vacuum configurations, with 2 active flavors of dynamical Wilson fermions at β=5.6. At our inverse lattice spacing, a<sup>-1</sup>≈2.3 GeV, we retrieve by a chiral extrapolation to the physical light quark masses the value m<sub>η</sub>′=3.7<sub>-4</sub><sup>+8</sup>m<sub>π</sub>. A crude extrapolation from (Nf=3) phenomenology would suggest m<sub>η</sub>′≈5.1m<sub>π</sub> for Nf=2 QCD. We verify that the mass gap between the singlet state η′ and the π flavor triplet state is due to gauge configurations with nontrivial topology.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | UNSPECIFIED |
| Authors: | Struckmann, T., Schilling, K., Bali, G., Eicker, N., Gusken, S., Lippert, T., Neff, H., Orth, B., Schroers, W., Viehoff, J., and Ueberholz, P. |
| Subjects: | Q Science > QC Physics |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Physical Review D |
| Publisher: | American Physical Society |
| ISSN: | 1550-7998 |
| ISSN (Online): | 1089-4918 |
| Published Online: | 05 March 2001 |
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