pi(0)pi(0) Production in proton-proton collisions at T-p=1.4 GeV The WASA-at-COSY Collaboration
2012 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 706, no 4-5, 256-262 p.Article in journal (Refereed) Published
The reaction pp -> pp pi(0)pi(0) has been investigated at a beam energy of 1.4 GeV using the WASA-at-COSY facility. The total cross section is found to be (324 +/- 21(systematic) +/- 58(normalization)) mu b. In order to study the production mechanism, differential kinematic distributions have been evaluated. The differential distributions indicate that both initial state protons are excited into intermediate Delta(1232) resonances, each decaying into a proton and a single pion, thereby producing the pion pair in the final state. No significant contribution of the Roper resonance N*(1440) via its decay into a proton and two pions is found.
Place, publisher, year, edition, pages
2012. Vol. 706, no 4-5, 256-262 p.
IdentifiersURN: urn:nbn:se:uu:diva-169367DOI: 10.1016/j.physletb.2011.11.041ISI: 000299756800004OAI: oai:DiVA.org:uu-169367DiVA: diva2:506645