Near threshold production of η-mesons in proton neutron collisions at ANKE

Daniel Schröer, Christopher Fritzsch, Alfons Khoukaz, Marcel Rump, A. Wrońska, A. Magiera, C. Guaraldo, H. Ströher
2016 EPJ Web of Conferences  
The interaction between hadrons and η-mesons is an intensively studied topic. Due to its stength it might lead to the formation of η-mesic nuclei. In order to study the characteristics of this interaction a measurement of the reaction p + d → d + η + p sp has been performed at the ANKE spectrometer at the COSY accelerator of the Forschungszentrum Jülich. The two different beam momenta (p 1 = 2.09 GeV/c and p 2 = 2.25 GeV/c) in combination with the Fermi motion inside the target deuteron grant
more » ... et deuteron grant access to the determination of total and differential cross sections in an excess energy range from threshold up to Q = 90 MeV. While the course of the total cross section, especially near threshold, will allow to extract the scattering length a dη via an s-wave final state interaction ansatz, the differential cross sections permit to verify the legitimacy of the s-wave assumption.
doi:10.1051/epjconf/201613003008 fatcat:oony7cdugrhzpbcubjabg6fmka