Ruiz de Elvira Carrascal, Jacobo; Meißner, U.-G.; Rusetsky, A.; Schierholz, G. (2017). Feynman–Hellmann theorem for resonances and the quest for QCD exotica. European physical journal. C - particles and fields, 77(10), p. 659. EDP Sciences 10.1140/epjc/s10052-017-5237-3
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The generalization of the Feynman–Hellmann theorem for resonance states in quantum field theory is derived. On the basis of this theorem, a criterion is pro- posed to study the possible exotic nature of certain hadronic states emerging in QCD. It is shown that this proposal is supported by explicit calculations in chiral perturbation the- ory and by large-Nc arguments. Analyzing recent lattice data on the quark mass dependence in the pseudoscalar, vector meson, baryon octet and baryon decuplet sectors, we con- clude that, as expected, these are predominately quark-model states, albeit the corrections are non-negligible.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
08 Faculty of Science > Institute of Theoretical Physics 10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) |
UniBE Contributor: |
Ruiz de Elvira Carrascal, Jacobo |
Subjects: |
500 Science > 530 Physics |
ISSN: |
1434-6044 |
Publisher: |
EDP Sciences |
Language: |
English |
Submitter: |
Esther Fiechter |
Date Deposited: |
02 Nov 2017 14:53 |
Last Modified: |
05 Dec 2022 15:07 |
Publisher DOI: |
10.1140/epjc/s10052-017-5237-3 |
ArXiv ID: |
1706.09015 |
BORIS DOI: |
10.7892/boris.106404 |
URI: |
https://boris.unibe.ch/id/eprint/106404 |
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