| Issue |
EPJ Web Conf.
Volume 175, 2018
35th International Symposium on Lattice Field Theory (Lattice 2017)
|
|
|---|---|---|
| Article Number | 05028 | |
| Number of page(s) | 8 | |
| Section | 5 Hadron Spectroscopy and Interactions | |
| DOI | https://doi.org/10.1051/epjconf/201817505028 | |
| Published online | 26 March 2018 | |
https://doi.org/10.1051/epjconf/201817505028
η and η′ masses and decay constants
1
Institute for Theoretical Physics, Universität Regensburg, D-93040 Regensburg, Germany
2
Department of Theoretical Physics, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005, India
* Speaker, e-mail: jakob.simeth@ur.de
Published online: 26 March 2018
We present preliminary results for the masses and decay constants of the η and η′ mesons using CLS Nf = 2 + 1 ensembles.
One of the major challenges in these calculations are the large statistical fluctuations due to disconnected quark loops. We tackle these by employing a combination of noise reduction techniques which are tuned to minimize the statistical error at a fixed cost. On the analysis side we carefully assess excited states contributions by using a direct fit approach.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
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