Abstract
This paper addresses the problem of how to extract an upper limit on the cross section for $ \Theta^+$ production via the reaction $ pp\rightarrow\Theta^+\Sigma^+$ , where the $ \Theta^+$ is assumed to decay into the $ pK^0$ subsystem. Recent data of the COSY-TOF Collaboration, namely the angular distribution of protons in the $ \Sigma^+K^0$ helicity frame and the invariant mass spectrum of the $ pK^0$ system, were scrutinised with regard to a resonance by applying the profile likelihood method. It is found that the former distribution is best suited for setting an upper limit on the $ \Theta^+$ production, which varies between 90nb for an assumed $ \Theta^+$ mass of 1500MeV/c^2 and 56nb for 1540MeV/c^2.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.