https://doi.org/10.1140/epja/i2008-10731-2
Regular Article - Experimental Physics
The dp → ppn reaction as a method to study neutron-proton charge-exchange amplitudes
1
High Energy Physics Institute, Tbilisi State University, 0186, Tbilisi, Georgia
2
Institut für Kernphysik, Forschungszentrum Jülich GmbH, 52425, Jülich, Germany
3
Jülich Centre for Hadron Physics, 52425, Jülich, Germany
4
Laboratoire de Physique Subatomique et de Cosmologie, 38026, Grenoble, France
5
Laboratory of Nuclear Problems, JINR, 141980, Dubna, Russia
6
Physikalisches Institut II, Universität Erlangen-Nürnberg, 91058, Erlangen, Germany
7
High Energy Physics Department, Petersburg Nuclear Physics Institute, 188350, Gatchina, Russia
8
Laboratory of High Energies, JINR, 141980, Dubna, Russia
9
Department of Physics, University of Basel, Klingelbergstrasse 82, 4056, Basel, Switzerland
10
Institut für Kernphysik, Universität Münster, 48149, Münster, Germany
11
H. Niewodniczański Institute of Nuclear Physics PAN, 31342, Kraków, Poland
12
Research Center for Nuclear Physics, Osaka University, 567-0047, Osaka Ibaraki, Japan
13
Institut für Kern- und Hadronenphysik, Forschungszentrum Rossendorf, 01314, Dresden, Germany
14
Physics and Astronomy Department, UCL, Gower Street, WC1E 6BT, London, UK
* e-mail: cw@hep.ucl.ac.uk
Received:
20
November
2008
Revised:
21
January
2009
Accepted:
6
February
2009
Published online:
5
March
2009
The differential cross section and deuteron analysing powers of the
p → {pp}n charge-exchange reaction have been measured with the ANKE spectrometer at the COSY storage ring. Using a deuteron beam of energy 1170MeV, data were obtained for small momentum transfers to a {pp} system with low excitation energy. A good quantitative understanding of all the measured observables is provided by the impulse approximation using known neutron-proton amplitudes. The proof of principle achieved here for the method suggests that measurements at higher energies will provide useful information in regions where the existing np database is far less reliable.
PACS: 13.75.-n – / Hadron-induced low- and intermediate-energy reactions and scattering – / energy ≤ 10 GeV – / 25.45.De Elastic and inelastic scattering – / 25.45.Kk Charge-exchange reactions –
© SIF, Springer-Verlag Berlin Heidelberg, 2009