| | |
| | |
Stat |
Members: 3645 Articles: 2'504'928 Articles rated: 2609
26 April 2024 |
|
| | | |
|
Article overview
| |
|
Two-Pion Production in Nucleon-Nucleon Collisions and the ABC-Effect - Approaching a Puzzleby exclusive and Kinematically complete Measurements | T. Skorodko
; M.Bashkanov
; C. Bargholtz
; D. Bogoslawsky
; H. Calen
; F. Cappellaro
; H. Clement
; L. Demiroers
; E. Doroshkevich
; D. Duniec
; C. Ekstrom
; K. Fransson
; L. Geren
; L. Gustafsson. B. Hoistad
; G. Ivanov
; l M. Jacewicz
; E. Jiganov
; T. Johansson
; M. Kaskulov
; O. Khakimova
; S. Keleta
; I. Koch
; F. Kren
; S. Kullander
; A. Kupsc
; A. Kuznetsov
; K. Lindberg
; P. Marciniewski
; B. Martemyanov
; R. Meier
; B. Morosov
; W. Oelert
; C. Pauly
; H. Pettersson
; Y. Petukhov
; A. Povtorejko
; A. Pricking
; R. J. M. Y. Ruber
; K. Schonning
; W. Scobel
; B. Shwartz
; V. Sopov
; J. Stepaniak
; P.-E. Tegner
; P. Thorngren-Engholm
; V. Tikhomirov
; A. Turowiecki
; G. J. Wagner
; M. Wolke
; A. Yamamoto
; J. Zabierowski
; I. Zartova
; J. Zlomanczuk
; PostScript
; PDF
; Other formats
; | Date: |
11 Dec 2006 | Journal: | Proc. CRIMEA06 Int. Conf. "New Trends in Heigh Energy Physics",
Yalta, Crimea 2006 | Abstract: | The ABC effect - a puzzling low-mass enhancement in the $pipi$ invariant mass spectrum - is known from inclusive measurements of two-pion production in nuclear collisions, where it always showed up, if the participating nucleons fused to a bound nuclear system in the final state. The first exclusive measurements on the ABC effect have been carried out very recently at CELSIUS-WASA for the fusion reactions leading to d, $^3$He and $^4$He nuclei in the final state. The data analyzed so far for the fusion processes to d and $^3$He reveal this effect to be a $sigma$ channel phenomenon associated with the formation of a strongly attractive $DeltaDelta$ system. The data for the strictly isospin-selective double-pionic fusion to $^4$He, where we expect the largest effect, are currently still analyzed. All inclusive data on this system are well described by our model, too. This case also constitutes the heaviest nuclear system, where exclusive measurements of double-pionic fusion can be carried out with present-day instruments. Surprisingly, the $pp o pppi^0pi^0$ reaction in the $DeltaDelta$ region is observed to also show a ABC-like low-$pipi$ mass enhancement, a phenomenon, which deserves special attention. | Source: | arXiv, nucl-ex/0612016 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
| News, job offers and information for researchers and scientists:
| |