2 pi production in pp collisions close to threshold

Citation
R. Bilger et al., 2 pi production in pp collisions close to threshold, NUCL PHYS A, 663, 2000, pp. 469C-472C
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
NUCLEAR PHYSICS A
ISSN journal
0375-9474 → ACNP
Volume
663
Year of publication
2000
Pages
469C - 472C
Database
ISI
SICI code
0375-9474(20000131)663:<469C:2PPIPC>2.0.ZU;2-B
Abstract
The reaction pp --> NN pi pi has been measured close to threshold in the en ergy range from 650 to 775 MeV using the PROMICE/WASA setup at CELSIUS. The se data constitute the first exclusive high-statistics measurements of this reaction on a pure hydrogen target, supplying both differential and integr al cross sections. The obtained total cross sections are an order of magnit ude below previously published bubble-chamber results. Differential spectra for pp --> pp pi(-)pi(+) are close to phase space predictions identifying the production via N*(1440) --> N(pi pi)(I=L=0) as the dominant process. Po ssible contributions from dibaryon resonances are discussed.