This title appears in the Scientific Report :
2017
Please use the identifier:
http://hdl.handle.net/2128/16986 in citations.
Please use the identifier: http://dx.doi.org/10.1140/epjc/s10052-017-5237-3 in citations.
Feynman–Hellmann theorem for resonances and the quest for QCD exotica
Feynman–Hellmann theorem for resonances and the quest for QCD exotica
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 proposed to study the possible exotic nature of certain hadronic states emerging in QCD. It is shown that this proposal is supported by explicit ca...
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Personal Name(s): | Ruiz de Elvira, J. (Corresponding author) |
---|---|
Meissner, Ulf-G. / Rusetsky, A. / Schierholz, G. | |
Contributing Institute: |
Theorie der starken Wechselwirkung; IKP-3 Theorie der Starken Wechselwirkung; IAS-4 |
Published in: | The @European physical journal / C, 77 (2017) 10, S. 659 |
Imprint: |
Berlin
Springer
2017
|
DOI: |
10.1140/epjc/s10052-017-5237-3 |
Document Type: |
Journal Article |
Research Program: |
TRR 110: Symmetrien und Strukturbildung in der Quantenchromodynamik Computational Science and Mathematical Methods |
Link: |
Get full text OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1140/epjc/s10052-017-5237-3 in citations.
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 proposed 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 Theory and by large-$N_c$ arguments. Analyzing recent lattice data on the quark mass dependence in the pseudoscalar, vector meson, baryon octet and baryon decuplet sectors, we conclude that, as expected, these are predominately quark-model states, albeit the corrections are non-negligible. |