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Träfflista för sökning "WFRF:(Collaboration WASA at COSY) "

Sökning: WFRF:(Collaboration WASA at COSY)

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1.
  • Adlarson, Patrik, et al. (författare)
  • Search for C violation in the decay eta -> pi(0)e(+)e(-) with WASA-at-COSY
  • 2018
  • Ingår i: Physics Letters B. - : ELSEVIER SCIENCE BV. - 0370-2693 .- 1873-2445. ; 784, s. 378-384
  • Tidskriftsartikel (refereegranskat)abstract
    • We report on the search for the rare decay eta -> pi(0)e(+)e(-) which is of interest to study C violation in the electromagnetic interaction which would indicate contributions from physics beyond the Standard Model, since the allowed decay via a two-photon intermediate state is strongly suppressed. The experiment has been performed using the WASA-at-COSY installation, located at the COSY accelerator of the Forschungszentrum Julich, Germany. In total 3 x 10(7) events of the reaction pd -> He-3 eta have been recorded at an excess energy of Q = 59.8MeV. Based on this data set the C parity violating decay eta -> pi(0)gamma* -> pi(0)e(+)e(-) via a single-photon intermediate state has been searched for, resulting in new upper limits of Gamma(eta -> pi(0)e(+) e(-))/Gamma(eta -> pi(+) pi(-) pi(0)) < 3.28 x 10(-5) and Gamma(eta -> pi(0)e(+) e(-))/Gamma(eta -> all)< 7.5 x 10(-6) (CL=90%), respectively. 
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2.
  • Heijkenskjold, Lena, et al. (författare)
  • Hadronic decays of the omega meson
  • 2014
  • Ingår i: Meson 2014 - 13th International Workshop on Production, Properties and Interaction of Mesons. - : EDP Sciences.
  • Konferensbidrag (refereegranskat)abstract
    • The WASA-at-COSY collaboration has collected a high statistics data set of. mesons produced through the p + d -> He-3 + omega reaction. This article presents the status of the ongoing studies of two. decay channels. The decay dynamics of the omega -> pi(+)pi(-)pi(0) channel is investigated by means of a Dalitz plot distribution and the omega -> pi(+)pi(-) channel is examined to search for a possible manifestation of rho - omega interference in hadronic production.
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