This title appears in the Scientific Report :
2009
Please use the identifier:
http://hdl.handle.net/2128/7228 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevLett.102.192301 in citations.
Observation of an ABC effect in proton-proton collisions
Observation of an ABC effect in proton-proton collisions
The cross section for inclusive multipion production in the pp -> ppX reaction was measured at COSY-ANKE at four beam energies, 0.8, 1.1, 1.4, and 2.0 GeV, for low excitation energy in the final pp system, such that the diproton quasiparticle is in the S-1(0) state. At the three higher energies,...
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Personal Name(s): | Dymov, S. |
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Hartmann, M. / Kacharava, A. / Khoukaz, A. / Komarov, V. / Kulessa, P. / Kulikov, A. / Kurbatov, V. / Macharashvili, G. / Merzliakov, S. / Mielke, M. / Mikirtychiants, S. / Nekipelov, M. / Nioradze, M. / Ohm, H. / Rathmann, F. / Ströher, H. / Tsirkov, D. / Uzikov, Yu. / Valdau, Yu. / Wilkin, C. / Yaschenko, S. / Zalikhanov, B. | |
Contributing Institute: |
Experimentelle Hadrondynamik; IKP-2 |
Published in: | Physical review letters, 102 (2009) S. 192301 |
Imprint: |
College Park, Md.
APS
2009
|
Physical Description: |
192301 |
DOI: |
10.1103/PhysRevLett.102.192301 |
Document Type: |
Journal Article |
Research Program: |
Physik der Hadronen und Kerne |
Series Title: |
Physical Review Letters
102 |
Subject (ZB): | |
Link: |
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Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1103/PhysRevLett.102.192301 in citations.
The cross section for inclusive multipion production in the pp -> ppX reaction was measured at COSY-ANKE at four beam energies, 0.8, 1.1, 1.4, and 2.0 GeV, for low excitation energy in the final pp system, such that the diproton quasiparticle is in the S-1(0) state. At the three higher energies, the missing-mass M-X spectra show a strong enhancement at low M-X, corresponding to an Abashian-Booth-Crowe effect that moves steadily to larger values as the energy is increased. Despite the missing-mass structure looking very different at 0.8 GeV, the variation with M-X and beam energy are consistent with two-pion production being mediated through the excitation of two Delta(1232) isobars, coupled to S and D states of the initial pp system. There is no sign of any resonancelike structure in the energy dependence of the type recently observed for the pn -> d pi(0)pi(0) total cross section. |