Strong isospin breaking in the decay constants of heavy-light mesons from local-duality QCD sum rules

Wolfgang Lucha, Dmitri Melikhov (Corresponding author), Silvano Simula

Publications: Contribution to journalMeeting abstract/Conference paperPeer Reviewed


We explore, by a rather peculiar limit of QCD sum rules subject to a Borel transformation (realized by allowing the related Borel mass parameter to approach infinity), how the small difference of the masses of up and down quark translates into the leptonic decay constants of pseudoscalar or vector heavy-light mesons. For the charmed and bottom mesons, we find that the decay constants of their lowest-lying charged and neutral representatives should differ by an amount of the order of 1 MeV.
Original languageEnglish
Article number116
Number of pages8
JournalProceedings of Science (PoS)
Publication statusPublished - 26 Sep 2019
Event13th Quark Confinement and the Hadron Spectrum, Confinement 2018 - Maynooth, Ireland
Duration: 31 Jul 20186 Aug 2018

Austrian Fields of Science 2012

  • 103034 Particle physics

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