Importance of chiral constraints for the pole content of the (K)over-barN scattering amplitude

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Importance of chiral constraints for the pole content of the (K)over-barN scattering amplitude

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Importance of chiral constraints for the pole content of the (K)over-barN scattering amplitude

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Projekt

<a href="/cs/project/GA19-19640S" target="_blank" >GA19-19640S: Studium interakcí hadronů, jejich produkce a vázaných stavů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Nuclear Physics. A

ISSN

0375-9474

e-ISSN

—

Svazek periodika

996

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

15

Strana od-do

121702

Kód UT WoS článku

000519669400012

EID výsledku v databázi Scopus

2-s2.0-85078220396