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

Autor(en)

Wolfgang Lucha, Dmitri Melikhov, Silvano Simula

Abstrakt

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.

Organisation(en)

Teilchenphysik

Externe Organisation(en)

Österreichische Akademie der Wissenschaften (ÖAW), Lomonosov Moscow State University (MSU), Universität Wien, Istituto Nazionale di Fisica Nucleare (INFN), Roma

Journal

Proceedings of Science (PoS)

Band

336

Anzahl der Seiten

8

DOI

https://doi.org/10.22323/1.336.0116

Publikationsdatum

09-2019

Peer-reviewed

Ja

ÖFOS 2012

103034 Teilchenphysik

ASJC Scopus Sachgebiete

General

Link zum Portal

https://ucris.univie.ac.at/portal/de/publications/strong-isospin-breaking-in-the-decay-constants-of-heavylight-mesons-from-localduality-qcd-sum-rules(1d6a0e10-d27e-4685-b069-c2cef0606b3b).html