η and η′ masses and decay constants
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: email@example.com
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
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