Coherent and incoherent pi(0) photoproduction from the deuteron

Citation
U. Siodlaczek et al., Coherent and incoherent pi(0) photoproduction from the deuteron, EUR PHY J A, 10(3), 2001, pp. 365-371
Citations number
20
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
EUROPEAN PHYSICAL JOURNAL A
ISSN journal
1434-6001 → ACNP
Volume
10
Issue
3
Year of publication
2001
Pages
365 - 371
Database
ISI
SICI code
1434-6001(200103)10:3<365:CAIPPF>2.0.ZU;2-Q
Abstract
Differential cross-sections for the reactions d(gamma,pi (o))d and d(gamma, pi (o))pn have been measured at MAMI with the TAPS detector setup in the en ergy range 140 MeV < E-<gamma> < 306 MeV. By use of the Glasgow tagging spe ctrometer an 0.8 MeV energy resolution for photons incident on the target w as achieved. The <pi>(o) missing energy resolution was sufficient for a rel iable separation of coherent and incoherent channels. The data for the brea k-up channel exhibit very strong final state interaction effects, whereas t he observed angular dependence of the inclusive process d(gamma, pi (o))X i s in quantitative agreement with predictions for a quasi-free process. The observed absolute d(gamma, pi (o))X cross-sections, on, the other hand, are significantly smaller than predicted by the quasi-free process for E-gamma greater than or similar to 250 MeV. Associating this failure with the pi ( o) photoproduction on the neutron would suggest that its cross-section is u p to 25% below the presently believed value.