Fotoprodukce neutrálních kaonů na C-12 v prahové oblasti

Kód výsledku v IS VaVaI

RIV/61389005:_____/07:00306869 - isvavai.cz

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Photo-production of neutral kaons on C-12 in the threshold region

Popis výsledku v původním jazyce

The kaon photo-production process on C-12 has been studied by measuring neutral kaons in the photon energy range of 0.8-1.1 GeV. Neutral kaons were identified by the invariant mass constructed from two charged pions emitted in the K-S(0) -> pi(+) pi(-) decay channel. The differential and integrated cross sections in the threshold photon energy region were obtained. The obtained momentum spectra were compared with a Spectator model calculation using elementary amplitudes of kaon photo-production given byrecent isobar models. The present results provide the first information on the n(gamma, K-0)Lambda reaction, which is expected to play an important role in constructing models of strangeness production by electromagnetic interactions. The experimental results show that the cross section of C-12(gamma, K-0) is of the same order as that of C-12(gamma, K+) and suggest that a slightly backward K-0 angular distribution is favored in the gamma n -> K-0 Lambda process.

Název v anglickém jazyce

Photo-production of neutral kaons on C-12 in the threshold region

Popis výsledku anglicky

The kaon photo-production process on C-12 has been studied by measuring neutral kaons in the photon energy range of 0.8-1.1 GeV. Neutral kaons were identified by the invariant mass constructed from two charged pions emitted in the K-S(0) -> pi(+) pi(-) decay channel. The differential and integrated cross sections in the threshold photon energy region were obtained. The obtained momentum spectra were compared with a Spectator model calculation using elementary amplitudes of kaon photo-production given byrecent isobar models. The present results provide the first information on the n(gamma, K-0)Lambda reaction, which is expected to play an important role in constructing models of strangeness production by electromagnetic interactions. The experimental results show that the cross section of C-12(gamma, K-0) is of the same order as that of C-12(gamma, K+) and suggest that a slightly backward K-0 angular distribution is favored in the gamma n -> K-0 Lambda process.

Druh

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

CEP obor

BE - Teoretická fyzika

OECD FORD obor

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Projekt

GA202/05/2142: Studium hyperjader

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2007

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

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Svazek periodika

651

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

6

Strana od-do

269-274

Kód UT WoS článku

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EID výsledku v databázi Scopus

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