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of 181
pro vyhledávání: '"Wolfgang Lucha"'
Autor:
Wolfgang Lucha
Publikováno v:
Universe, Vol 9, Iss 8, p 358 (2023)
Currently, flavour-cryptoexotic tetraquarks form the most common sort of all experimentally established exotic multiquark hadrons. This note points out a few promising concepts that should help improve theoretical (but, for several reasons, not quite
Externí odkaz:
https://doaj.org/article/e4692999d0e24f7d94ad801e6b201119
Autor:
Wolfgang Lucha
Publikováno v:
Universe, Vol 9, Iss 4, p 171 (2023)
Motivated by recent experimental progress in establishing the likely existence of (variants of) exotic hadrons, predicted to be formed by the strong interactions, various proposed concepts and ideas are compiled in an attempt to draft a coherent pict
Externí odkaz:
https://doaj.org/article/20093d821bf1491a9b8a7412480a80c1
Local-duality QCD sum rules for strong isospin breaking in the decay constants of heavy–light mesons
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 2, Pp 1-12 (2018)
Abstract We discuss the leptonic decay constants of heavy–light mesons by means of Borel QCD sum rules in the local-duality (LD) limit of infinitely large Borel mass parameter. In this limit, for an appropriate choice of the invariant structures in
Externí odkaz:
https://doaj.org/article/eb86836105ab4ece9cc6b6e27af8b1d0
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 77, Iss 12, Pp 1-11 (2017)
Abstract Considering four-point correlation functions of color-singlet quark bilinears, we investigate, in the large- $$N_{\mathrm {c}}$$ N c limit of QCD, the subleading diagrams that involve, in the s-channel of meson–meson scattering amplitudes,
Externí odkaz:
https://doaj.org/article/ffbdc4a650b64b73b14272e4a4ffc1cd
Publikováno v:
Physics Letters B, Vol 765, Iss C, Pp 365-370 (2017)
We present a study of the strong isospin-breaking (IB) effect, due in QCD to the difference between u- and d-quark masses, in the leptonic decay constants of charmed and beauty pseudoscalar and vector mesons using the method of QCD sum rules. We appl
Externí odkaz:
https://doaj.org/article/22d333f0e6f9488eae348ed4b6f7b363
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 11, Pp 1-1 (2018)
We correct Eq. (1) of the original paper, where the term.
Externí odkaz:
https://doaj.org/article/32647a1afd364d79a2d75878dc928d15
Publikováno v:
ESI preprints.
Publikováno v:
ESI preprints.
Publikováno v:
ESI preprints.
Autor:
Wolfgang Lucha, Maung Maung Khin
Quantum chromodynamics is generally accepted to be the quantum field theory which describes the strong interactions in elementary particle physics. However, the question of the mechanism responsible for the “confinement” of the color degrees of f
