Measurement of radiative widths of a(2)(1320) and pi(2)(1670)
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F14%3A10284904" target="_blank" >RIV/00216208:11320/14:10284904 - isvavai.cz</a>
Alternative codes found
RIV/68081731:_____/14:00432680
Result on the web
<a href="http://dx.doi.org/10.1140/epja/i2014-14079-8" target="_blank" >http://dx.doi.org/10.1140/epja/i2014-14079-8</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1140/epja/i2014-14079-8" target="_blank" >10.1140/epja/i2014-14079-8</a>
Alternative languages
Result language
angličtina
Original language name
Measurement of radiative widths of a(2)(1320) and pi(2)(1670)
Original language description
The COMPASS Collaboration at CERN has investigated the reaction pi(-)gamma -> pi(-)pi(-)pi(+) embedded in the Primakoff reaction of 190 GeV pions scattering in the Coulomb field of a lead target, pi Pb- -> pi(-)pi(-)pi Pb+. Exchange of quasi-real photonsis selected by isolating the sharp Coulomb peak observed at momentum transfer below 0.001 (GeV/c)(2). Using a partial-wave analysis the amplitudes and relative phases of the a(2)(1320) and pi(2)(1670) mesons have been extracted, and the Coulomb and thediffractive contributions have been disentangled. Measuring absolute production cross sections we have determined the radiative width of the a(2)(1320) to be Gamma(0)(a(2)(1320) -> pi gamma) = (358 +/- 6(stat) +/- 42(syst)) keV. As the first measurement,Gamma(0)(pi(2)(1670) -> pi gamma) = (181 +/- 11(stat) +/- 27(syst)) keV . (BRf2 pi PDG/BRf2 pi) is obtained for the radiative width of the pi(2)(1670), where in this analysis the branching ratio BRf2 pi PDG = 0.56 has been used. We compa
Czech name
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Czech description
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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
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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)
Others
Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
European Physical Journal A
ISSN
1434-6001
e-ISSN
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Volume of the periodical
50
Issue of the periodical within the volume
4
Country of publishing house
DE - GERMANY
Number of pages
18
Pages from-to
1-18
UT code for WoS article
000335162200001
EID of the result in the Scopus database
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