Photoproduction of K+Σ0 within the isobar model

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F24%3A00604106" target="_blank" >RIV/61389005:_____/24:00604106 - isvavai.cz</a>

Výsledek na webu

<a href="https://journals.aps.org/prc/abstract/10.1103/PhysRevC.110.065204" target="_blank" >https://journals.aps.org/prc/abstract/10.1103/PhysRevC.110.065204</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevC.110.065204" target="_blank" >10.1103/PhysRevC.110.065204</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Photoproduction of K+Σ0 within the isobar model

Popis výsledku v původním jazyce

We investigate the photoproduction off a proton target in the channel with K+ and Sigma(0) in the final state. The model of our choice for description of this process is based on effective Lagrangians at the tree level, it is the so-called isobar model. This formalism was developed previously for description of K(+)A photoproduction, and the aim of this study is to provide an extension of this description towards Sigma photoproduction channels. Our fitting strategy has two stages. In the first stage we employ standard chi(2) minimization using a set of resonances, based on previous works. In the second stage, we apply a model selection procedure to the same set of resonances using L-1 regularization in combination with criteria from information theory, and we obtain a sparser model. This gives us two fits which we compare with data and comment on their behavior. Some of the available data (CLAS differential cross sections at energies W > 2.4 GeV, SAPHIR differential cross sections, and C-x and C-z' polarizations) are not included in the fits, but are used to test the predictive power of the two models. The sparser model shows better agreement with the unfitted data compared to the full model.

Název v anglickém jazyce

Photoproduction of K+Σ0 within the isobar model

Popis výsledku anglicky

We investigate the photoproduction off a proton target in the channel with K+ and Sigma(0) in the final state. The model of our choice for description of this process is based on effective Lagrangians at the tree level, it is the so-called isobar model. This formalism was developed previously for description of K(+)A photoproduction, and the aim of this study is to provide an extension of this description towards Sigma photoproduction channels. Our fitting strategy has two stages. In the first stage we employ standard chi(2) minimization using a set of resonances, based on previous works. In the second stage, we apply a model selection procedure to the same set of resonances using L-1 regularization in combination with criteria from information theory, and we obtain a sparser model. This gives us two fits which we compare with data and comment on their behavior. Some of the available data (CLAS differential cross sections at energies W > 2.4 GeV, SAPHIR differential cross sections, and C-x and C-z' polarizations) are not included in the fits, but are used to test the predictive power of the two models. The sparser model shows better agreement with the unfitted data compared to the full model.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Physical Review C

ISSN

2469-9985

e-ISSN

2469-9993

Svazek periodika

110

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

065204

Kód UT WoS článku

001390131700002

EID výsledku v databázi Scopus

2-s2.0-85213557671