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2011

Electromagnetic corrections to pseudoscalar decay constants

Glaessle, Benjamin, Bali, Gunnar S.

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The effects of electromagnetic interactions on pseudoscalar decay constants are investigated.

Using a compact QED and QCD action we are able to resolve differences of about 0.1 MeV.
We obtain the preliminary results f_pi^0-f_pi^+/- =0.09(3) MeV and f_D^0-f_D^+/- =0.79(11) MeV for light and charmed pseudoscalar decay constants on a N_f=2 nonperturbatively improved Sheikholeslami-Wohlert ensemble.

Electromagnetic corrections to pseudoscalar decay constants · Around

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