Observations of S∗ → π+π−in ψ decay

Observations of S∗ → π+π−in ψ decay

G. Gidal,G. Goldhaber,J.G. Guy,R.E. Millikan,G.S. Abrams,M.S. Alam,C.A. Blocker,A. Blondel,A. Boyarski,M. Breidenbach,D.L. Burke,W.C. Carithers,W. Chinowsky,M.W. Coles,S. Cooper,W.E. Dieterle,J.B. Dillon,J. Dorehbosch,J.M. Dorfan,M.W. Eaton,G.J. Fe,M.E.B. Franklin,G. Hanson,K.A. Hayes,T. Himel,D.G. Hitlin,R. Hollebeek,W. Innes,J. Jaros,P. Jenni,A.D. Johnson,J.A. Kadyk,A.J. Lankford,R.R. Larsen,V. Luth,M.E. Nelson,C.Y. Pang,J.F. Patrick,B. Richter,A. Roussarie,D.L. Scharre,R.H. Schindler,R.F. Schwitters,J.L. Siegrist,J. Strait,H. Taureg,M. Tonutti,G.H. Trilling,E.N. Vella,R.A. Vidal,I. Videau,J.M. Weiss,H. Zaccone;G. Gidal;G. Goldhaber;J.G. Guy;R.E. Millikan;G.S. Abrams;M.S. Alam;C.A. Blocker;A. Blondel;A. Boyarski;M. Breidenbach;D.L. Burke;W.C. Carithers;W. Chinowsky;M.W. Coles;S. Cooper;W.E. Dieterle;J.B. Dillon;J. Dorehbosch;J.M. Dorfan;M.W. Eaton;G.J. Fe;M.E.B. Franklin;G. Hanson;K.A. Hayes;T. Himel;D.G. Hitlin;R. Hollebeek;W. Innes;J. Jaros;P. Jenni;A.D. Johnson;J.A. Kadyk;A.J. Lankford;R.R. Larsen;V. Luth;M.E. Nelson;C.Y. Pang;J.F. Patrick;B. Richter;A. Roussarie;D.L. Scharre;R.H. Schindler;R.F. Schwitters;J.L. Siegrist;J. Strait;H. Taureg;M. Tonutti;G.H. Trilling;E.N. Vella;R.A. Vidal;I. Videau;J.M. Weiss;H. Zaccone;
physics letters b 1981 Vol. 107 pp. 153-158
115
zaccone1981physicsobservations

Abstract

Copious production of S∗ decaying into π+π− is observed in ψ decay. (974 ± 4 -i14 ± 5) MeV, consistent with the parameters extracted from couplede channel; fits to pheripheral π+π− and K+K− production experiments. The inclusive branching ratio for ψ → S∗ + X is found to be (0.42 ± 0.08)%.

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