Spin alignment and violation of the OZI rule in exclusive ? and ? production in pp collisions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F14%3A00218823" target="_blank" >RIV/68407700:21340/14:00218823 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.nuclphysb.2014.07.020" target="_blank" >http://dx.doi.org/10.1016/j.nuclphysb.2014.07.020</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.nuclphysb.2014.07.020" target="_blank" >10.1016/j.nuclphysb.2014.07.020</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Spin alignment and violation of the OZI rule in exclusive ? and ? production in pp collisions

Popis výsledku v původním jazyce

Exclusive production of the isoscalar vector mesons ? and ? is measured with a 190 GeV/c190 GeV/c proton beam impinging on a liquid hydrogen target. Cross section ratios are determined in three intervals of the Feynman variable xFxF of the fast proton. Asignificant violation of the OZI rule is found, confirming earlier findings. Its kinematic dependence on xFxF and on the invariant mass MpVMpV of the system formed by fast proton pfastpfast and vector meson V is discussed in terms of diffractive production of pfastVpfastV resonances in competition with central production. The measurement of the spin density matrix element ?00?00 of the vector mesons in different selected reference frames provides another handle to distinguish the contributions of thesetwo major reaction types. Again, dependences of the alignment on xFxF and on MpVMpV are found. Most of the observations can be traced back to the existence of several excited baryon states contributing to ? production which are absent in

Název v anglickém jazyce

Spin alignment and violation of the OZI rule in exclusive ? and ? production in pp collisions

Popis výsledku anglicky

Exclusive production of the isoscalar vector mesons ? and ? is measured with a 190 GeV/c190 GeV/c proton beam impinging on a liquid hydrogen target. Cross section ratios are determined in three intervals of the Feynman variable xFxF of the fast proton. Asignificant violation of the OZI rule is found, confirming earlier findings. Its kinematic dependence on xFxF and on the invariant mass MpVMpV of the system formed by fast proton pfastpfast and vector meson V is discussed in terms of diffractive production of pfastVpfastV resonances in competition with central production. The measurement of the spin density matrix element ?00?00 of the vector mesons in different selected reference frames provides another handle to distinguish the contributions of thesetwo major reaction types. Again, dependences of the alignment on xFxF and on MpVMpV are found. Most of the observations can be traced back to the existence of several excited baryon states contributing to ? production which are absent in

Druh

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

CEP obor

BF - Elementární částice a fyzika vysokých energií

OECD FORD obor

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Projekt

<a href="/cs/project/LG13031" target="_blank" >LG13031: Spolupráce ČR s CERN</a><br>

Návaznosti

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

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

Nuclear Physics B

ISSN

0550-3213

e-ISSN

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Svazek periodika

886

Číslo periodika v rámci svazku

září

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

24

Strana od-do

1078-1101

Kód UT WoS článku

000341344500035

EID výsledku v databázi Scopus

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