Measurement of the analysing power in proton-proton elastic scattering at small angles


The proton analysing power in ~pp elastic scattering has been measured at small angles at COSY-ANKE at 796 MeV and five other beam energies between 1.6 and 2.4 GeV using a polarised proton beam. The asymmetries obtained by detecting the fast proton in the ANKE forward detector or the slow recoil proton in a silicon tracking telescope are completely consistent. Although the analysing power results agree well with the many published data at 796 MeV, and also with the most recent partial wave solution at this energy, the ANKE data at the higher energies lie well above the predictions of this solution at small angles. An updated phase shift analysis that uses the ANKE results together with the World data leads to a much better description of these new measurements.

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@inproceedings{Chiladze2014MeasurementOT, title={Measurement of the analysing power in proton-proton elastic scattering at small angles}, author={D . Chiladze and S . Dymov and A . Kacharava and G . Macharashvili and S . G . Barsov and Ronja Gebel and Bingcong Gou and Michael Hartmann and I . Keshelashvili and A . Khoukaz and P . Kulessa and Anatoly Kulikov and A . Lehrach and N . L . Lomidze and Bruno Lorentz and Romana Maier and D . Mchedlishvili and S . Merzliakov and S . Mikirtychyants and Medea Nioradze and Herb Ohm and Michael Papenbrock and D . Prasuhn and Frank Rathmann and V . Serdyuk and V . Shmakova and R . Stassen and Heidi Stockhorst and Igor Strakovsky and Hans Str{\"{o}her and M . D . Tabidze and Annagret Taeschner and Sergey Trusov and D . Tsirkov and Yu . N . Uzikov and Yu . Valdau and Colin Wilkin and Ron Workman}, year={2014} }