Exclusive measurements of pd-&gt;3HePiPi: The ABC effect revisited

Bashkanov, M.; Bogoslawsky, D.; Kullander, S.; Clement, H.; Petukhov, Y.; Morosov, B.; Gustafsson, L.; Ekström, C.; Ivanov, G.; Skorodko, T.; Johansson, T.; Jiganov, E.; Greiff, J.; Zabierowski, J.; Wagner, G. J.; Höistad, B.; Stepaniak, J.; Oelert, W.; Zlomanczuk, J.; Koch, I.; Khakimova, O.; Thörngren-Engblom, P.; Calen, H.; Tikhomirov, V.; Tchernyshev, V.; Sopov, V.; Keleta, S.; Shwartz, B.; Kuznetsov, A.; Wolke, M.; Yamamoto, A.; Scobel, W.; Fransson, K.; Demiroers, L.; Kaskulov, M. M.; Jacewicz, M.; Povtorejko, A.; Pauly, C.; Cappellaro, F.; Marciniewski, P.; Ruber, R.J.M.Y.; Meier, R.; Kren, F.; Turowiecki, A.; Kupsc, A.

doi:10.1016/j.physletb.2006.03.082

Journal Article

Exclusive measurements of pd->3HePiPi: The ABC effect revisited

Bashkanov, M. ; Bogoslawsky, D. ; Calen, H. ; Cappellaro, F. ; Clement, H. ; Demiroers, L. ; Ekström, C. ; Fransson, K. ; Greiff, J. ; Gustafsson, L. ; Höistad, B. ; Ivanov, G. ; Jacewicz, M. ; Jiganov, E. ; Johansson, T. ; Khakimova, O. ; Kaskulov, M. M. ; Keleta, S. ; Koch, I. ; Kren, F. ; Kullander, S. ; Kupsc, A. ; Kuznetsov, A. ; Marciniewski, P. ; Meier, R. ; Morosov, B. ; Oelert, W.FZJ* ; Pauly, C. ; Petukhov, Y. ; Povtorejko, A. ; Ruber, R. J. M. Y. ; Scobel, W. ; Skorodko, T. ; Shwartz, B. ; Sopov, V. ; Stepaniak, J. ; Tchernyshev, V. ; Thörngren-Engblom, P. ; Tikhomirov, V. ; Turowiecki, A. ; Wagner, G. J. ; Wolke, M. ; Yamamoto, A. ; Zabierowski, J. ; Zlomanczuk, J.

2006
North-Holland Publ. Amsterdam

Physics letters / B 637, 223 (2006) [10.1016/j.physletb.2006.03.082]

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Please use a persistent id in citations: http://hdl.handle.net/2128/10617 doi:10.1016/j.physletb.2006.03.082

Abstract: Exclusive measurements of the reactions pd -> He-3 pi(+)7 pi(-) and pd -> He-3 pi(0)pi(0) have been carried out at T-p = 0.893 GeV at the CELSIUS storage ring using the WASA detector. The pi(+)pi(-) channel evidences a pronounced enhancement at low invariant pi pi masses-as anticipated from previous inclusive measurements of the ABC effect. This enhancement is seen to be even much larger in the isoscalar pi(0)pi(0) channel. The differential distributions prove this enhancement to be of scalar-isoscalar nature. Delta Delta calculations give a good description of the data, if a boundstate condition is imposed for the intermediate Delta Delta system. (c) 2006 Elsevier B.V. All fights reserved.

Keyword(s): p deuteron: exclusive reaction ; pi: pair production ; mass spectrum: two-pion ; mass enhancement ; Dalitz plot ; angular distribution ; four-pi-detector: experimental results ; Uppsala CELSIUS Stor ; p deuteron --> helium-3 pi+ pi- ; p deuteron --> helium-3 2pi0 ; 0.893 GeV-cms

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Physics, Multidisciplinary

Note: Record converted from VDB: 12.11.2012

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Research Program(s):

Physik der Hadronen und Kerne (P53)

Appears in the scientific report 2006

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OpenAccess

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