This title appears in the Scientific Report :
2008
Please use the identifier:
http://hdl.handle.net/2128/10503 in citations.
Please use the identifier: http://dx.doi.org/10.1140/epja/i2007-10543-x in citations.
Single pion production in np collisions for excess energies up to 90 MeV
Single pion production in np collisions for excess energies up to 90 MeV
The quasifree reaction np --> pp pi(-) was studied in a kinematically complete experiment by bombarding a liquid-hydrogen target with a deuteron beam of momentum 1.85GeV/c and analyzing the data along the lines of the spectator model. In addition to the three charged ejectiles the spectator proto...
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Personal Name(s): | Abdel-Bary, M. |
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COSY-TOF, Collab. | |
Contributing Institute: |
Experimentelle Hadronstruktur; IKP-1 JARA-ENERGY; JARA-ENERGY |
Published in: | The @European physical journal / A, 36 (2008) S. 7 - 16 |
Imprint: |
Berlin
Springer
2008
|
Physical Description: |
7 - 16 |
DOI: |
10.1140/epja/i2007-10543-x |
Document Type: |
Journal Article |
Research Program: |
Physik der Hadronen und Kerne |
Series Title: |
European Physical Journal A
36 |
Subject (ZB): | |
Link: |
Get full text OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1140/epja/i2007-10543-x in citations.
The quasifree reaction np --> pp pi(-) was studied in a kinematically complete experiment by bombarding a liquid-hydrogen target with a deuteron beam of momentum 1.85GeV/c and analyzing the data along the lines of the spectator model. In addition to the three charged ejectiles the spectator proton was also detected in the large-acceptance time-of-flight spectrometer COSY-TOF. It was identified by its momentum and flight direction thus yielding access to the Fermi motion of the bound neutron and to the effective neutron 4-momentum vector P-n which differed from event to event. A range of almost 90 MeV excess energy above threshold was covered. Energy-dependent angular distributions, invariant-mass spectra as well as fully covered Dalitz plots were deduced. Sizeable pp FSI effects were found as were contributions of p and d partial waves. In comparison with existing literature data the results provide a sensitive test of the spectator model. The behavior of the elementary cross-section sigma(01) close to threshold is discussed in view of new cross-section data. |