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Type: Conference paper
Title: Flavour symmetry breaking and tuning the strange quark mass for 2+1 quark flavours
Author: Bietenholz, W.
Bornyakov, V.
Gockeler, M.
Hemmert, T.
Horsley, R.
Lockhart, W.
Nakamura, Y.
Perlt, H.
Pleiter, D.
Rakow, P.
Schafer, A.
Schierholz, G.
Schiller, A.
Streuer, T.
Stüben, H.
Winter, F.
Zanotti, J.
Citation: Proceedings of Science: XXVIIIth International Symposium on Lattice Field Theory, Lattice 2010, held in Villasimius, Italy, 14-19 June, 2010: pp.1-14
Publisher: Scuola Internazionale Superiore di Studi Avanzati (S I S S A)
Publisher Place: Italy
Issue Date: 2010
Series/Report no.: POS (Lattice 2010); 122
ISSN: 1824-8039
Conference Name: International Symposium on Lattice Field Theory (28th : 2010 : Villasimius, Italy)
Statement of
W. Bietenholz, V. Bornyakov, M. Göckeler, T. Hemmert, R. Horsley, W.G. Lockhart, Y. Nakamura, H. Perlt, D. Pleiter, P.E.L. Rakow, A.S. Schäfer, G. Schierholz, A. Schiller, T. Streuer, H. Stüben, F. Winter and J.M. Zanotti (QCDSF-UKQCD Collaboration)
Abstract: QCD lattice simulations with 2+1 flavours typically start at rather large up-down and strange quark masses and extrapolate first the strange quark mass to its physical value and then the up-down quark mass. An alternative method of tuning the quark masses is discussed here in which the singlet quark mass is kept fixed, which ensures that the kaon always has mass less than the physical kaon mass. Using group theory the possible quark mass polynomials for a Taylor expansion about the flavour symmetric line are found, which enables highly constrained fits to be used in the extrapolation of hadrons to the physical pion mass. Numerical results confirm the usefulness of this expansion and an extrapolation to the physical pion mass gives hadron mass values to within a few percent of their experimental values.
Rights: © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-Share Alike Licence.
RMID: 0020120297
DOI: 10.22323/1.105.0122
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Appears in Collections:Chemistry and Physics publications

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