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Low-mass pi pi enha...
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Bashkanov, M.Physikalisches Institut, Universität Tübingen
(author)
Low-mass pi pi enhancement in baryonic pi pi production : ABC effect revised by exclusive measurements
- Article/chapterEnglish2007
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LIBRIS-ID:oai:DiVA.org:uu-16890
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-16890URI
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https://doi.org/10.1142/S0217751X07035987DOI
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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The ABC effect - a puzzling threshold enhancement in the ππ invariant mass spectrum of double-pionic fusion to nuclear bound states - has been investigated since 40 years by inclusive measurements without providing a conclusive interpretation. First exclusive measurements to this topic have now been carried out at CELSIUS-WASA. They confirm a huge ππ threshold enhancement, prove it to be of scalar-isoscalar nature, i.e., a σ-channel phenomenon and reveal the theoretically predicted high-mass enhancement in inclusive spectra to be of πππ rather than of ππ nature - falsifying thus corresponding model predictions for the ABC effect. From the kinematically complete data samples we infer that the interaction between the two Δ particles created in this process is of crucial importance.
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Calèn, HansUppsala universitet,The Svedberg-laboratoriet(Swepub:uu)hanscale
(author)
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Cappellaro, F.Uppsala universitet,Institutionen för kärn- och partikelfysik
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Ekström, CurtUppsala universitet,The Svedberg-laboratoriet(Swepub:uu)cek03918
(author)
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Fransson, KjellUppsala universitet,The Svedberg-laboratoriet(Swepub:uu)kjelfran
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Gustafsson, LeifUppsala universitet,Institutionen för kärn- och partikelfysik(Swepub:uu)leifgust
(author)
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Höistad, BoUppsala universitet,Institutionen för kärn- och partikelfysik(Swepub:uu)bohoista
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Jacewicz, MarekUppsala universitet,Institutionen för kärn- och partikelfysik(Swepub:uu)mja03009
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Johansson, TordUppsala universitet,Institutionen för kärn- och partikelfysik(Swepub:uu)tordjoha
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Keleta, SamsonUppsala universitet,Institutionen för kärn- och partikelfysik(Swepub:uu)sanke516
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Koch, I.Uppsala universitet,Institutionen för kärn- och partikelfysik
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Kullander, SvenUppsala universitet,Institutionen för kärn- och partikelfysik(Swepub:uu)sku03009
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Kupść, AndrzejUppsala universitet,The Svedberg-laboratoriet
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Marciniewski, PawelUppsala universitet,The Svedberg-laboratoriet(Swepub:uu)pawemarc
(author)
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Ruber, RogerUppsala universitet,The Svedberg-laboratoriet
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Thörngren-Engblom, PiaUppsala universitet,The Svedberg-laboratoriet(Swepub:uu)pth13060
(author)
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Wolke, MagnusUppsala universitet,Institutionen för kärn- och partikelfysik(Swepub:uu)mawol031
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Zlomanczuk, JozefUppsala universitet,Institutionen för kärn- och partikelfysik(Swepub:uu)jozezlom
(author)
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Physikalisches Institut, Universität TübingenThe Svedberg-laboratoriet
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In:International Journal of Modern Physics A22:2-3, s. 625-6280217-751X1793-656X
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Bashkanov, M.
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Calèn, Hans
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Cappellaro, F.
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Ekström, Curt
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Fransson, Kjell
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Gustafsson, Leif
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Höistad, Bo
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Jacewicz, Marek
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Johansson, Tord
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Keleta, Samson
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Koch, I.
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Kullander, Sven
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Kupść, Andrzej
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Marciniewski, Pa ...
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Ruber, Roger
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Thörngren-Engblo ...
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Wolke, Magnus
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Zlomanczuk, Joze ...
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