This title appears in the Scientific Report :
2009
Please use the identifier:
http://dx.doi.org/10.1140/epja/i2008-10721-4 in citations.
Please use the identifier: http://hdl.handle.net/2128/10455 in citations.
Single-pion production in pp collisions at 0.95 GeV/c (II)
Single-pion production in pp collisions at 0.95 GeV/c (II)
The single-pion production reactions pp -> d pi(+), pp -> np pi(+) and pp -> pp pi(0) were measured at a beam momentum of 0.95 GeV/c (T-p approximate to 400 MeV) using the short version of the COSY-TOF spectrometer. The central calorimeter provided particle identification, energy determinat...
Saved in:
Personal Name(s): | Abdel-Samad, S. |
---|---|
Bilger, R. / Brinkmann, K. / et, al | |
Contributing Institute: |
Experimentelle Hadronstruktur; IKP-1 |
Published in: | The @European physical journal / A, 39 (2009) S. 281 - 289 |
Imprint: |
Berlin
Springer
2009
|
Physical Description: |
281 - 289 |
DOI: |
10.1140/epja/i2008-10721-4 |
Document Type: |
Journal Article |
Research Program: |
Physik der Hadronen und Kerne |
Series Title: |
European Physical Journal A
39 |
Subject (ZB): | |
Link: |
Get full text OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/10455 in citations.
The single-pion production reactions pp -> d pi(+), pp -> np pi(+) and pp -> pp pi(0) were measured at a beam momentum of 0.95 GeV/c (T-p approximate to 400 MeV) using the short version of the COSY-TOF spectrometer. The central calorimeter provided particle identification, energy determination and neutron detection in addition to time-of-flight and angle measurements from other detector parts. Thus all pion production channels were recorded with 1-4 overconstraints. The main emphasis is put on the presentation and discussion of the npp+ channel, since the results on the other channels have already been published previously. The total and differential cross-sections obtained are compared to theoretical calculations. In contrast to the pp pi(0) channel we observe in the np pi(+) channel a strong influence of the Delta excitation. In particular, the pion angular distribution exhibits a (3cos(2) circle minus + 1)-dependence, typical for a pure s-channel Delta excitation and identical to that observed in the dp+ channel. Since the latter is understood by a s-channel resonance in the D-1(2) pn partial wave, we discuss an analogous scenario for the pn pi(+) channel. |