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Double Pion Product...
Double Pion Production in the dd to αππ reaction
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- Keleta, Samson, 1971- (författare)
- Uppsala universitet,Avdelningen för kärnfysik
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Thörngren Engblom, Pia (preses)
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Höistad, Bo (preses)
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visa fler...
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- Ströher, Hans, Prof. (opponent)
- IKP-2 Experimental Hadron Physics, Forschungszentrum, Juelich
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visa färre...
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(creator_code:org_t)
- ISBN 9789155472313
- Uppsala : Avdelningen för kärnfysik, 2008
- Engelska 107 s.
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Serie: Uppsala Dissertations from the Faculty of Science and Technology, 1104-2516 ; 77
- Relaterad länk:
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https://urn.kb.se/re...
Abstract
Ämnesord
Stäng
- The reaction dd → 4Heππ has been measured exclusively for the first time. The measurements were performed at Td = 712 MeV and Td = 1029 MeV, with the WASA detector assembly at CELSIUS (Uppsala-Sweden). The aim was to investigate a long standing puzzle, the so called ABC effect. This is a peculiar feature of double pion production in light nuclei collisions. In addition to confirming previous experimental observations in this regard, our results also reveal a strong angular dependence of the pions in the overall center of mass system as well as non-isotropic angular distribution of the low mass enhancement in the ππ invariant mass. The results are qualitatively reproduced by a theoretical model, according to which, the ABC effect is described as a result of kinematical enhancement in the independent production of the pion pairs from two parallel and independent NN → dπ reactions.
Nyckelord
- Nuclear physics
- ABC effect
- double pion
- Kärnfysik
- Nuclear Physics
- kärnfysik
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