I n t e r n at I o n a l Jo u r n a l o f HI g H -en e r g y PH y s I c s CERN COURIERV o l u m e 49 nu m b e r 4 ma y 2009 ‘Vague, but exciting’ ACCELERATORS COSMIC RAYS COLLABORATIONS FFAGs enter the era of PAMELA finds a ATLAS makes a smooth applications p5 positron excess p12 changeover at the top p31 CCMay09Cover.indd 1 14/4/09 09:44:43 CONTENTS Covering current developments in high- energy physics and related fields worldwide CERN Courier is distributed to member-state governments, institutes and laboratories affiliated with CERN, and to their personnel. It is published monthly, except for January and August. The views expressed are not necessarily those of the CERN management. Editor Christine Sutton Editorial assistant Carolyn Lee CERN CERN, 1211 Geneva 23, Switzerland E-mail
[email protected] Fax +41 (0) 22 785 0247 Web cerncourier.com Advisory board James Gillies, Rolf Landua and Maximilian Metzger COURIERo l u m e u m b e r a y Laboratory correspondents: V 49 N 4 m 2009 Argonne National Laboratory (US) Cosmas Zachos Brookhaven National Laboratory (US) P Yamin Cornell University (US) D G Cassel DESY Laboratory (Germany) Ilka Flegel, Ute Wilhelmsen EMFCSC (Italy) Anna Cavallini Enrico Fermi Centre (Italy) Guido Piragino Fermi National Accelerator Laboratory (US) Judy Jackson Forschungszentrum Jülich (Germany) Markus Buescher GSI Darmstadt (Germany) I Peter IHEP, Beijing (China) Tongzhou Xu IHEP, Serpukhov (Russia) Yu Ryabov INFN (Italy) Romeo Bassoli Jefferson Laboratory (US) Steven Corneliussen JINR Dubna (Russia) B Starchenko KEK National Laboratory (Japan) Youhei Morita Lawrence Berkeley Laboratory (US) Spencer Klein Seeing beam once again p6 Dirac was right about antimatter p15 A new side to Peter Higgs p36 Los Alamos National Laboratory (US) C Hoffmann NIKHEF Laboratory (Netherlands) Paul de Jong Novosibirsk Institute (Russia) S Eidelman News 5 NCSL (US) Geoff Koch Orsay Laboratory (France) Anne-Marie Lutz FFAGs enter the applications era.