Study of exclusive one-pion and one-eta production using hadron and dielectron channels in pp reactions at kinetic beam energies of 1.25 GeV and 2.2 GeV with HADES

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F12%3A00384721" target="_blank" >RIV/61389005:_____/12:00384721 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1140/epja/i2012-12074-9" target="_blank" >http://dx.doi.org/10.1140/epja/i2012-12074-9</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epja/i2012-12074-9" target="_blank" >10.1140/epja/i2012-12074-9</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Study of exclusive one-pion and one-eta production using hadron and dielectron channels in pp reactions at kinetic beam energies of 1.25 GeV and 2.2 GeV with HADES

Popis výsledku v původním jazyce

We present measurements of exclusive pi(+,0) and eta production in pp reactions at 1.25 GeV and 2.2 GeV beam kinetic energy in hadron and dielectron channels. In the case of pi(+) and pi(0), high-statistics invariant-mass and angular distributions are obtained within the HADES acceptance as well as acceptance-corrected distributions, which are compared to a resonance model. The sensitivity of the data to the yield and production angular distribution of Delta(1232) and higher-lying baryon resonances is shown, and an improved parameterization is proposed. The extracted cross-sections are of special interest in the case of pp -> pp eta, since controversial data exist at 2.0 GeV; we find sigma = 0.142 +/- 0.022 mb. Using the dielectron channels, the pi(0)and eta Dalitz decay signals are reconstructed with yields fully consistent with the hadronic channels. The electron invariant masses and acceptance-corrected helicity angle distributions are found in good agreement with model predictions

Název v anglickém jazyce

Study of exclusive one-pion and one-eta production using hadron and dielectron channels in pp reactions at kinetic beam energies of 1.25 GeV and 2.2 GeV with HADES

Popis výsledku anglicky

We present measurements of exclusive pi(+,0) and eta production in pp reactions at 1.25 GeV and 2.2 GeV beam kinetic energy in hadron and dielectron channels. In the case of pi(+) and pi(0), high-statistics invariant-mass and angular distributions are obtained within the HADES acceptance as well as acceptance-corrected distributions, which are compared to a resonance model. The sensitivity of the data to the yield and production angular distribution of Delta(1232) and higher-lying baryon resonances is shown, and an improved parameterization is proposed. The extracted cross-sections are of special interest in the case of pp -> pp eta, since controversial data exist at 2.0 GeV; we find sigma = 0.142 +/- 0.022 mb. Using the dielectron channels, the pi(0)and eta Dalitz decay signals are reconstructed with yields fully consistent with the hadronic channels. The electron invariant masses and acceptance-corrected helicity angle distributions are found in good agreement with model predictions

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BG - Jaderná, atomová a molekulová fyzika, urychlovače

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název periodika

European Physical Journal A

ISSN

1434-6001

e-ISSN

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Svazek periodika

48

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

17

Strana od-do

1-17

Kód UT WoS článku

000304696800003

EID výsledku v databázi Scopus

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