Differential cross section and analysing power of the reaction at 353 MeV

The differential cross section d I / d ICO and analysing power A y of the p a p a { p p } s I 0 reaction have been measured at COSY-ANKE at 353 MeV. The final proton pair was detected at very low excitation energy, leading to an S-wave diproton, denoted here as { p p } s . The angular dependence of...

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Bibliographic Details
Published in:Physics letters. B 2012-06, Vol.712 (4-5), p.370-374
Main Authors: Tsirkov, D, Azaryan, T, Baru, V, Chiladze, D, Dymov, S, Dzyuba, A, Gebel, R, Goslawski, P, Hanhart, C, Hartmann, M, Kacharava, A, Khoukaz, A, Komarov, V, Kulessa, P, Kulikov, A, Kurbatov, V, Lensky, V, Lorentz, B, Macharashvili, G, Mchedslishvili, D, Mielke, M, Mikirtytchiants, S, Merzliakov, S, Nioradze, M, Ohm, H, Papenbrock, M, Rathmann, F, Serdyuk, V, Shmakova, V, Stroeher, H, Uzikov, Yu, Valdau, Yu, Wilkin, C
Format: Article
Language:English
Subjects:
Amplitudes
Cross sections (physics)
Elastic scattering
Elementary particles
Nuclear power generation
Perturbation theory
Pions
State of the art
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Summary:The differential cross section d I / d ICO and analysing power A y of the p a p a { p p } s I 0 reaction have been measured at COSY-ANKE at 353 MeV. The final proton pair was detected at very low excitation energy, leading to an S-wave diproton, denoted here as { p p } s . The angular dependence of both d I / d ICO and A y can be described in terms of s- and d-wave pion production. By using phase information from elastic pp scattering, unique solutions are derived for the corresponding amplitudes only as a result of the combined analysis of both experimental observables. The large d-wave term thus obtained is important for the tests of the current state-of-the-art chiral perturbation theory approach. The amplitudes will also help towards determining the isospin dependence of pion production in nucleonanucleon collisions with diproton formation.
ISSN:0370-2693
DOI:10.1016/j.physletb.2012.05.004