In order to establish links between p-wave pion production in nucleon-nucleon collisions and low energy three-nucleon scattering, an extensive programme of experiments on pion production is currently underway at COSY-ANKE. The final proton pair is measured at very low excitation energy, leading to an S-wave diproton, denoted here as {pp}_s. By using a deuterium target we have obtained data on the differential cross section and analysing power of the quasi-free pol{p}n -> {pp}_s pi^- reaction at 353 MeV. The spectator proton p_sp was either measured directly in silicon tracking telescopes or reconstructed using the momentum of a detected pi^-. Both observables can be described in terms of s-, p-, and d-wave pion production amplitudes. Taken together with the analogous data on the pol{p}p -> {pp}_s pi^0 reaction, full partial wave decompositions of both processes were carried out.

Differential cross section and analysing power of of the quasi-free pn->{pp}s pi- reaction at 353 MeV

BENATI, Paolo;BERTELLI, Susanna;GUIDOBONI, Greta;LENISA, Paolo;
2012

Abstract

In order to establish links between p-wave pion production in nucleon-nucleon collisions and low energy three-nucleon scattering, an extensive programme of experiments on pion production is currently underway at COSY-ANKE. The final proton pair is measured at very low excitation energy, leading to an S-wave diproton, denoted here as {pp}_s. By using a deuterium target we have obtained data on the differential cross section and analysing power of the quasi-free pol{p}n -> {pp}_s pi^- reaction at 353 MeV. The spectator proton p_sp was either measured directly in silicon tracking telescopes or reconstructed using the momentum of a detected pi^-. Both observables can be described in terms of s-, p-, and d-wave pion production amplitudes. Taken together with the analogous data on the pol{p}p -> {pp}_s pi^0 reaction, full partial wave decompositions of both processes were carried out.
S., Dymov; T., Azaryan; S., Barsov; V., Baru; Benati, Paolo; Bertelli, Susanna; D., Chiladze; A., Dzyuba; R., Gebel; P., Goslawski; Guidoboni, Greta; C., Hanhart; M., Hartmann; A., Kacharava; A., Khoukaz; V., Komarov; P., Kulessa; A., Kulikov; V., Kurbatov; Lenisa, Paolo; V., Lensky; N., Lomidze; B., Lorentz; G., Macharashvili; M., Mielke; S., Mikirtytchiants; S., Merzliakov; H., Ohm; M., Papenbrock; F., Rathmann; V., Serdyuk; V., Shmakova; H., Stroeher; M., Tabidze; D., Tsirkov; S., Trusov; Uzikov, Y. u.; Valdau, Y. u.; C., Wilkin
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/1679322
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