Title
Radial excitations of heavy-light mesons from QCD sum rules Radial excitations of heavy-light mesons from QCD sum rules
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Berlin ,
Subject
Physics
Source (journal)
European physical journal : C : particles and fields. - Berlin
Volume/pages
74(2014) :8 , 35 p.
ISSN
1434-6044
1434-6044
Article Reference
2980
Carrier
E-only publicatie
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
QCD sum rules are commonly used to predict the characteristics of ground-state hadrons. We demonstrate that two-point sum rules for the decay constants of charmed () and bottom () mesons can also be modified to estimate the decay constants of the first radial excitations, and , respectively, provided the masses of these resonances are used as an input. For the radially excited charmed mesons we use available experimental data, whereas the masses of analogous bottom mesons are estimated from the heavy-quark limit. The decay constants predicted for the radial excitations of heavy-light pseudoscalar and vector mesons are systematically smaller than those of the ground states and we comment on the possible origin of this difference. Our results can be used in the sum rule calculations of heavy-to-light form factors and in the factorization approximations for nonleptonic -meson decays where the decay constants of charmed mesons enter as input parameters.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/fe77f0/8399.pdf
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