Feynman–Hellmann theorem for resonances and the quest for QCD exotica

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)

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:

02 Nov 2017 14:53

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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