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Observation of ?+?-?+?- Photoproduction in Ultra-Peripheral Heavy Ion Collisions at (radical)sNN = 200 GeV at the STAR Detector

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F10%3A00167660" target="_blank" >RIV/68407700:21340/10:00167660 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Observation of ?+?-?+?- Photoproduction in Ultra-Peripheral Heavy Ion Collisions at (radical)sNN = 200 GeV at the STAR Detector

  • Original language description

    We present(radical)a measurement of ?+?-?+?- photonuclear production in ultra-peripheral Au-Au collisions at sNN = 200 GeV from the STAR experiment. The ?+?-?+?- final states are ob- served at low transverse momentum and are accompanied by mutual nuclearexcitation of the beam particles. The strong enhancement of the production cross section at low transverse momentum 2 is consistent with coherent photoproduction. The ?+?-?+?- invariant mass spectrum of the co- herent events exhibits a broad peak around1540 ? 40 MeV/c2 with a width of 570 ? 60 MeV/c2, in agreement with the photoproduction data for the ?0(1700). We do not observe a corresponding peak in the ?+?- final state and measure an upper limit for the ratio of the branching fractions of the ?0(1700) to ?+?- and ?+?-?+?- of 2.5 % at 90 % confidence level.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    BF - Elementary particle theory and high energy physics

  • OECD FORD branch

Result continuities

  • Project

    Result was created during the realization of more than one project. More information in the Projects tab.

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach

Others

  • Publication year

    2010

  • Confidentiality

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

Data specific for result type

  • Name of the periodical

    Physical Review C

  • ISSN

    0556-2813

  • e-ISSN

  • Volume of the periodical

    81

  • Issue of the periodical within the volume

    4

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    9

  • Pages from-to

  • UT code for WoS article

    000277209500056

  • EID of the result in the Scopus database