Abstract
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. (C) 2011 Elsevier B.V. All rights reserved.
Original language | English |
---|---|
Pages (from-to) | 256-262 |
Number of pages | 7 |
Journal | Physics Letters B |
Volume | 706 |
Issue number | 4-5 |
DOIs | |
Publication status | Published - 5 Jan 2012 |
Keywords
- 2-PION PRODUCTION
- ROPER RESONANCE
- PION PRODUCTION
- CROSS-SECTIONS
- EXCITATION
- MODEL
- PP