Neutron skin deduced from antiprotonic atom data

B. Alex Brown,1,4 G. Shen,2,3 G. C. Hillhouse,2,4 J. Meng,2,4,5,6 and A. Trzcińska7 1Department of Physics and Astronomy, National Superconducting Cyclotron Laboratory, and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824-1321, USA 2School of Physics, Peking University, Beijing 100871, People’s Republic of China 3Department of Physics, Indiana University Bloomington, Indiana 47405, USA 4Department of Physics, University of Stellenbosch, Stellenbosch, South Africa 5Institute of Theoretical Physics, Chinese Academy of Science, Beijing 100080, People’s Republic of China 6Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, People’s Republic of China 7Heavy Ion Laboratory, Warsaw University, PL-02-093 Warsaw, Poland (Received 2 February 2006; revised manuscript received 29 June 2007; published 6 September 2007)