uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
pi pi production in proton-proton collisions
Physikalisches Institut, Universität Tübingen.
Uppsala University, The Svedberg Laboratory.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
Uppsala University, The Svedberg Laboratory.
Show others and affiliations
2007 (English)In: International Journal of Modern Physics A, ISSN 0217-751X, E-ISSN 1793-656X, Vol. 22, no 2-3, 509-513 p.Article in journal (Refereed) Published
Abstract [en]

At CELSIUS-WASA the two-pion production in proton-proton collisisons has been measured exclusively from threshold up to the energy regime, where both of the collision partners are expected to be excited to the Δ state. The measurements constitute the first kinematically complete data samples of solid statistics in this energy range. Most of the data have been obtained for the π+π- and π0π0channels. Whereas at near-threshold energies the differential distributions can be succesfully explained by chiral dynamics and Roper excitation, respectively, the data for the π+π- channel in the ΔΔ region can be described only, if the special configuration (ΔΔ)0+ is assumed. The data for the π0π0 channel moreover exhibit a low-mass enhancement in the π0π0 invariant mass spectrum, which is reminiscent of the ABC-effect found in double-pionic fusion to light nuclei.

Place, publisher, year, edition, pages
2007. Vol. 22, no 2-3, 509-513 p.
Keyword [en]
Roper excitation, ΔΔ excitation, σ channel enhancement, ABC effect, ππ interaction
National Category
Physical Sciences
URN: urn:nbn:se:uu:diva-16892DOI: 10.1142/S0217751X07035720ISI: 000250926800039OAI: oai:DiVA.org:uu-16892DiVA: diva2:44663
Available from: 2008-06-16 Created: 2008-06-16 Last updated: 2011-04-14Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Calèn, HansFransson, KjellGustafsson, LeifHöistad, BoJacewicz, MarekJohansson, TordKeleta, SamsonKullander, SvenKupsc, AndrzejMarciniewski, PawelThörngren-Engblom, PiaZlomanczuk, Jozef
By organisation
The Svedberg LaboratoryDepartment of Nuclear and Particle Physics
In the same journal
International Journal of Modern Physics A
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 165 hits
ReferencesLink to record
Permanent link

Direct link