Sigma(0) production in proton nucleus collisions near threshold

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F18%3A00491106" target="_blank" >RIV/61389005:_____/18:00491106 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.physletb.2018.02.043" target="_blank" >http://dx.doi.org/10.1016/j.physletb.2018.02.043</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2018.02.043" target="_blank" >10.1016/j.physletb.2018.02.043</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Sigma(0) production in proton nucleus collisions near threshold

Popis výsledku v původním jazyce

The production of Sigma(0) baryons in the nuclear reaction p (3.5 GeV) + Nb (corresponding to root sNN = 3.18 GeV) is studied with the detector set-up HADES at GSI, Darmstadt. Sigma(0)s were identified via the decay Sigma 0 -> Lambda gamma with subsequent decays Lambda -> p pi(-) in coincidence with a e(+)e(-) pair from either external (gamma -> e(+)e(-)) or internal (Dalitz decay gamma* -> e(+)e(-)) gamma conversions. The differential Sigma(0) cross section integrated over the detector acceptance, i.e. the rapidity interval 0.5 < y < 1.1, has been extracted as Delta sigma(Sigma 0) = 2.3 +/- (0.2)(stat) +/- ((+0.6)(-0.6))(sys) +/- (0.2)(norm) mB, yielding the inclusive production cross section in full phase space sigma(total)(Sigma 0) = 5.8 +/- (0.5)(stat) +/- ((+1.4)(-1.4))(sys) +/- (0.6)(norm) +/- (1.7)(extrapol) mb by averaging over different extrapolation methods. The Lambda(all)/Sigma(0) ratio within the HADES acceptance is equal to 2.3 +/- (0.2)(stat) +/- ((+0.6)(-0.6))(sys). The obtained rapidity and momentum distributions are compared to transport model calculations. The Sigma(0) yield agrees with the statistical model of particle production in nuclear reactions.

Název v anglickém jazyce

Sigma(0) production in proton nucleus collisions near threshold

Popis výsledku anglicky

The production of Sigma(0) baryons in the nuclear reaction p (3.5 GeV) + Nb (corresponding to root sNN = 3.18 GeV) is studied with the detector set-up HADES at GSI, Darmstadt. Sigma(0)s were identified via the decay Sigma 0 -> Lambda gamma with subsequent decays Lambda -> p pi(-) in coincidence with a e(+)e(-) pair from either external (gamma -> e(+)e(-)) or internal (Dalitz decay gamma* -> e(+)e(-)) gamma conversions. The differential Sigma(0) cross section integrated over the detector acceptance, i.e. the rapidity interval 0.5 < y < 1.1, has been extracted as Delta sigma(Sigma 0) = 2.3 +/- (0.2)(stat) +/- ((+0.6)(-0.6))(sys) +/- (0.2)(norm) mB, yielding the inclusive production cross section in full phase space sigma(total)(Sigma 0) = 5.8 +/- (0.5)(stat) +/- ((+1.4)(-1.4))(sys) +/- (0.6)(norm) +/- (1.7)(extrapol) mb by averaging over different extrapolation methods. The Lambda(all)/Sigma(0) ratio within the HADES acceptance is equal to 2.3 +/- (0.2)(stat) +/- ((+0.6)(-0.6))(sys). The obtained rapidity and momentum distributions are compared to transport model calculations. The Sigma(0) yield agrees with the statistical model of particle production in nuclear reactions.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

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)

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Physics Letters. B

ISSN

0370-2693

e-ISSN

—

Svazek periodika

781

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

6

Strana od-do

735-740

Kód UT WoS článku

000435653100097

EID výsledku v databázi Scopus

2-s2.0-85047563376