community, and a proposed "Hadrou collider" at CERN in the LEP tunnel. The 

 first is a giant proton beam collider of QO.OOOGeV at a cost of several billions of 

 dollars to be ready in the mid nineties. The second one would be of lesser energy, 

 6000 to 9000 GeV and much cheaper (around one billion depending on the energy) 

 since it is a smaller machine and the infrastructure and tunnel are already there. It 

 could be ready in the nineties, if the construction does not interfere too much with 

 the e.xploitatiou of LEP. 



Clearly these projects would have a better chance of being approved if there 

 were a sizable foreign contribution to their construction. In both projects, there is 

 a danger that the high costs would either postpone or eliminate them. 



Unfortunately the two projects are competitive. The approval of one would 

 imply the rejection of the other if such approval would occur in the near future. 

 Both sides feel strongly about their projects: the USA needs a vigorous project 

 of assured technical feasibility so as to not suffer a decline in its activites; CERN 

 would like to see a future in hadrou collider physics which, after all, was pioneered 

 by them. 



These are the reasons that negotiations are difficult at this moment. Also, 

 the European High Energj- program is so extended with HERA and LEP under 

 construction, that the European governments would not consider any further new 

 projects or participation in new projects for some time to come. Japan or Canada 

 may be more inclined to consider participation of the Step 4 type with either the 

 US or the European Project. 



