https://doi.org/10.1051/epjconf/201819200041
Strong Isospin Breaking in Heavy-Meson Decay Constants: Employing Borelized QCD Sum Rules in Local-Duality Limit
1
Institute for High Energy Physics, Austrian Academy of Sciences,
Nikolsdorfergasse 18, A-1050 Vienna,
Austria
2
D. V. Skobeltsyn Institute of Nuclear Physics, M. V. Lomonosov Moscow State University,
119991 Moscow,
Russia
3
Faculty of Physics, University of Vienna,
Boltzmanngasse 5, A-1090 Vienna,
Austria
4
INFN, Sezione di Roma Tre,
Via della Vasca Navale 84, I-00146 Roma,
Italy
* e-mail: Wolfgang.Lucha@oeaw.ac.at
** e-mail: dmitri_melikhov@gmx.de
*** e-mail: simula@roma3.infn.it
Published online: 14 November 2018
Applying the QCD sum-rule machinery in the so-called local-duality shape to heavy-light mesons reveals that, as a consequence of the non-zero mass gap between up and down quarks, the leptonic decay constants of the neutral and charged versions of the D, D*, B and B* mesons differ by approximately 1 MeV.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
