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000811030 1001_ $$0P:(DE-HGF)0$$aHorsley, R.$$b0
000811030 245__ $$aQED effects in the pseudoscalar meson sector
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000811030 520__ $$aIn this paper we present results on the pseudoscalar meson masses from a fully dynamical simulation of QCD+QED, concentrating particularly on violations of isospin symmetry. We calculate the π +-π 0 splitting and also look at other isospin violating mass differences. We have presented results for these isospin splittings in [1]. In this paper we give more details of the techniques employed, discussing in particular the question of how much of the symmetry violation is due to QCD, arising from the different masses of the u and d quarks, and how much is due to QED, arising from the different charges of the quarks. This decomposition is not unique, it depends on the renormalisation scheme and scale. We suggest a renormalisation scheme in which Dashen’s theorem for neutral mesons holds, so that the electromagnetic self-energies of the neutral mesons are zero, and discuss how the self-energies change when we transform to a scheme such as M S, in which Dashen’s theorem for neutral mesons is violated.
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000811030 7001_ $$0P:(DE-HGF)0$$aNakamura, Y.$$b1
000811030 7001_ $$0P:(DE-HGF)0$$aPerlt, H.$$b2
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000811030 7001_ $$0P:(DE-HGF)0$$aRakow, P. E. L.$$b4$$eCorresponding author
000811030 7001_ $$0P:(DE-HGF)0$$aSchierholz, G.$$b5
000811030 7001_ $$0P:(DE-HGF)0$$aSchiller, A.$$b6
000811030 7001_ $$0P:(DE-HGF)0$$aStokes, R.$$b7
000811030 7001_ $$0P:(DE-HGF)0$$aStüben, H.$$b8
000811030 7001_ $$0P:(DE-HGF)0$$aYoung, R. D.$$b9
000811030 7001_ $$0P:(DE-HGF)0$$aZanotti, J. M.$$b10
000811030 773__ $$0PERI:(DE-600)2027350-2$$a10.1007/JHEP04(2016)093$$gVol. 2016, no. 4, p. 93$$n4$$p93$$tJournal of high energy physics$$v2016$$x1029-8479$$y2016
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