Coupled channels approach to eta N and eta ' N interactions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F19%3A00517483" target="_blank" >RIV/61389005:_____/19:00517483 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.nuclphysa.2019.121630" target="_blank" >https://doi.org/10.1016/j.nuclphysa.2019.121630</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.nuclphysa.2019.121630" target="_blank" >10.1016/j.nuclphysa.2019.121630</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Coupled channels approach to eta N and eta ' N interactions

Popis výsledku v původním jazyce

We present a coupled channels separable potential approach to eta N and eta'N interactions using a chiral symmetric interaction kernel. The s-wave pi N amplitudes and pi(-) p induced total cross sections are reproduced satisfactorily in a broad interval of energies despite limiting the channel space to two-body interactions of pseudoscalar mesons with the baryon ground-state octet. It is demonstrated that an explicit inclusion of the eta 0 meson singlet field leads to a more attractive eta N interaction, with the real part of the scattering length exceeding 1 fm. The eta'N diagonal coupling appears sufficient to generate an eta'N bound state but the inter-channel dynamics moves the respective pole far from the physical region making the eta'N interaction repulsive at energies around the channel threshold. The N* (1535) and N* (1650) resonances are generated dynamically and the origin and properties of the S-matrix poles assigned to them are studied in detail. We also hint at a chance that the N* (1895) state might also be formed provided a suitably varied model setting is found.

Název v anglickém jazyce

Coupled channels approach to eta N and eta ' N interactions

Popis výsledku anglicky

We present a coupled channels separable potential approach to eta N and eta'N interactions using a chiral symmetric interaction kernel. The s-wave pi N amplitudes and pi(-) p induced total cross sections are reproduced satisfactorily in a broad interval of energies despite limiting the channel space to two-body interactions of pseudoscalar mesons with the baryon ground-state octet. It is demonstrated that an explicit inclusion of the eta 0 meson singlet field leads to a more attractive eta N interaction, with the real part of the scattering length exceeding 1 fm. The eta'N diagonal coupling appears sufficient to generate an eta'N bound state but the inter-channel dynamics moves the respective pole far from the physical region making the eta'N interaction repulsive at energies around the channel threshold. The N* (1535) and N* (1650) resonances are generated dynamically and the origin and properties of the S-matrix poles assigned to them are studied in detail. We also hint at a chance that the N* (1895) state might also be formed provided a suitably varied model setting is found.

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

2019

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

992

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

33

Strana od-do

121630

Kód UT WoS článku

000497602500018

EID výsledku v databázi Scopus

2-s2.0-85072705673