9 December 1999 Ž . Physics Letters B 469 1999 270–275 The r-mass, width and line shape in pp annihilation at rest into p q p y p 0 Crystal Barrel Collaboration A. Abele h , J. Adomeit g , C. Amsler n , A.V. Anisovich c,1 , C.A. Baker e , B.M. Barnett c,2 , C.J. Batty e , A. Berdoz l , S. Bischoff h , P. Blum h , K. Braune k , ¨ D.V. Bugg i , T. Case a , O. Cramer k , V. Crede c , K.M. Crowe a , T. Degener b , ´ M. Doser f , W. Dunnweber k , A. Ehmanns c , D. Engelhardt h , M.A. Faessler k , ¨ P. Giarritta n , R.P. Haddock j , F.H. Heinsius a,3 , M. Heinzelmann n , A. Herbstrith h , M. Herz c , N.P. Hessey k , P. Hidas d , C. Hodd i , C. Holtzhaußen h , D. Jamnik k,4 , H. Kalinowsky c , P. Kammel a , J. Kisiel f,5 , E. Klempt c , H. Koch b , M. Kunze b , U. Kurilla b , M. Lakata a , R. Landua f , H. Matthay b , R. McCrady l , J. Meier g , ¨ C.A. Meyer l , R. Ouared g , K. Peters b , B. Pick c , M. Ratajczak b , C. Regenfus n , W. Roethel k , S. Spanier n,6 , H. Stock b , C. Straßburger c , U. Strohbusch g , ¨ M. Suffert m , J.S. Suh c , U. Thoma c , M. Tischhauser h , I. Uman k , C. Volcker k , ¨ ¨ S. Wallis-Plachner k , D. Walther k,7 , U. Wiedner k,8 , K. Wittmack c , B.S. Zou i a UniÕersity of California, LBNL, Berkeley, CA 94720, USA b UniÕersitat Bochum, D-44780 Bochum, Germany ¨ c UniÕersitat Bonn, D-53115 Bonn, Germany ¨ d Academy of Science, H-1525 Budapest, Hungary e Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, UK f CERN, CH-1211 GeneÕa 4, Switzerland g UniÕersitat Hamburg, D-22761 Hamburg, Germany ¨ h UniÕersitat Karlsruhe, D-76021 Karlsruhe, Germany ¨ i Queen Mary and Westfield College, London E1 4NS, UK j UniÕersity of California, Los Angeles, CA 90024, USA k UniÕersitat Munchen, D-80333 Munchen, Germany ¨ ¨ ¨ l Carnegie Mellon UniÕersity, Pittsburgh, PA 15213, USA m Centre de Recherches Nucleaires, F-67037 Strasbourg, France ´ n UniÕersitat Zurich, CH-8057 Zurich, Switzerland ¨ ¨ ¨ Received 10 August 1999; accepted 29 October 1999 Editor: K. Winter 0370-2693r99r$ - see front matter q 1999 Published by Elsevier Science B.V. All rights reserved. Ž . PII: S0370-2693 99 01284-8