[1] UNIV ST ANDREWS,SCH MATH & COMP SCI,ST ANDREWS KY16 9SS,FIFE,SCOTLAND
[2] UNIV ST ANDREWS,SCH MATH & COMPUTAT SCI,ST ANDREWS KY16 9SS,FIFE,SCOTLAND
[3] UNIV CALIF LOS ANGELES,DEPT PHYS,LOS ANGELES,CA 90024
[4] UKAEA,ABINGDON OX14 3DB,OXON,ENGLAND
[5] RUSSIAN ACAD SCI,INST GEN PHYS,MOSCOW,RUSSIA