赝标衰变常数的电磁修正
Electromagnetic corrections to pseudoscalar decay constants
摘要:
研究了电磁相互作用对赝标衰变常数的影响。使用紧凑的QED和QCD行动,我们能够解决约0.1 MeV的差异。在N_f=2的非微扰改进的Sheikholeslami-Wohlert系综上,我们得到了光和粲赝标衰变常数f_pi^0-f_pi^0 +/-= 0.09(3)MeV和f_D^0-f_D^0 +/- =0.79(11)MeV的初步结果.
英文摘要:
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.
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