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Welcome to the home page for the antiproton proton goes to anti-lambda lambda project at Seattle University!

The aim of this project is to implement a quark anti-quark annihilation and creation model to try and explain the production of strange particles produced from proton anti-proton reactions.   Our objective is to be able to make a meaningful statement as to whether the reaction takes place at the quark level or at the meson-exchange level. 

For the summer of 2001 we are analyzing the abundant data on the reaction produced at CERN. Currently we are working on the initial state of the reaction using a one boson exchange potential that contains 7 - 10 parameters. Later in the summer we intend to freeze the best values for the parameters from the initial state and move to examining the final state. The final state (lambda lambda-bar) should present some difficulty as little previous work has been carried out because of the difficulty associated with producing hyperon targets and beams used for directly studying the reaction.

1/18/2001 update...

Dr. Alberg and Mr. Shoup attended the APS, JPS joint meeting in Maui, Hawaii to present the results of the summer work on the initial state interaction. Good fits to the cross section data have been made using a 7 parameter gaussian model. However we have upgraded to a 12 parameter gaussian model in order to successfully fit the polarization data. We have had great success with the new model but continue to exhaustively search for the best parameters.

Hyperon Production: