Importance of chiral constraints for the pole content of the (K)over-barN scattering amplitude
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F20%3A00523759" target="_blank" >RIV/61389005:_____/20:00523759 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.nuclphysa.2020.121702" target="_blank" >https://doi.org/10.1016/j.nuclphysa.2020.121702</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.nuclphysa.2020.121702" target="_blank" >10.1016/j.nuclphysa.2020.121702</a>
Alternative languages
Result language
angličtina
Original language name
Importance of chiral constraints for the pole content of the (K)over-barN scattering amplitude
Original language description
We critically examine the (K) over barN coupled-channel approach presented in [1] and demonstrate that it violates constraints imposed by chiral symmetry of QCD. The origin of this violation can be traced back to the off-shell treatment of the chiral-effective vertices, in combination with the use of non-relativistic approximations and the chosen regularization scheme. We propose an improved version of the approach, which is directly given by a resummation of relativistic Feynman graphs of baryon chiral perturbation theory, and is in accord with the chiral symmetry constraint. Within this improved model, two poles are generated dynamically in the isoscalar pi Sigma - (K) over barN coupled channels sector, in contrast with the non-relativistic model of [1] in which only one such pole was reported. (C) 2020 Elsevier B.V. All rights reserved.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Result continuities
Project
<a href="/en/project/GA19-19640S" target="_blank" >GA19-19640S: Study of Hadron Interactions, Production and Bound States</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Nuclear Physics. A
ISSN
0375-9474
e-ISSN
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Volume of the periodical
996
Issue of the periodical within the volume
4
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
15
Pages from-to
121702
UT code for WoS article
000519669400012
EID of the result in the Scopus database
2-s2.0-85078220396