ScienceDirect - Physics Letters B : High-statistics study of f0(1500) decay into π0π0

Physics Letters B
Volume 342, Issues 1-4, 12 January 1995, Pages 433-439

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doi:10.1016/0370-2693(94)01515-E

High-statistics study of f₀(1500) decay into π⁰π⁰

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Crystal Barrel Collaboration , C. Amslerⁿ, D. S. Armstrong^a^,¹, I. Augustin^a^,², C. A. Baker^e, B. M. Barnett^c, C. J. Batty^e, K. Beuchert^b, P. Birien^a, P. Blüm^h, R. Bossingham^a, K. Braune^k, J. Brose^j^,³, M. Burchell^f^,⁴, T. Case^a, S. U. Chung^j^,⁵, O. Cramer^k, K. M. Crowe^a, T. Degener^b, H. P. Dietz^k, S. v. Dombrowskiⁿ, M. Doser^f, W. Dünnweber^k, D. Engelhardt^h, M. Englert^k, M. A. Faessler^k, C. Felix^k, R. Hackmann^j, R. P. Haddockⁱ, F. H. Heinsius^a, M. Herz^b, N. P. Hessey^f, P. Hidas^d, P. Illinger^k, D. Jamnik^k^,⁶, H. Kalinowsky^j, B. Kämmle^g, T. Kiel^h, J. Kisiel^k^,⁷, E. Klempt^c, M. Kobel^f^,⁸, H. Koch^b, C. Kolo^k, K. Königsmann^k^,⁹, M. Kunze^b, M. Lakata^a, R. Landua^f, F. Loser^g, J. Lüdemann^b, H. Matthäy^b, M. Merkel^j^,¹⁰, J. P. Merlo^j, C. A. Meyer^l, L. Montanet^f, A. Nobleⁿ, F. Ould-Saadaⁿ, K. Peters^b, C. N. Pinder^e, G. Pinter^d, S. Ravndal^b^,¹⁰, C. Regenfus^k, J. Salk^b, E. Schäfer^j, P. Schmidt^g, R. Seibert^g, S. Spanier^j, H. Stöck^b, C. Straßburger^c, U. Strohbusch^g, M. Suffert^m, U. Thoma^c, D. Urnerⁿ, C. Völcker^k, F. Walter^j, D. Walther^b, U. Wiedner^g, N. Winter^h, J. Zoll^f and . Zupan i ^k

^a University of California, LBL, Berkeley, CA 94720, USA

^b Universität Bochum, D-44780, Bochum, FRG

^c Universität Bonn, D-53115, Bonn, FRG

^d Academy of Science, H-1525, Budapest, Hungary

^e Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, UK

^f CERN, CH-1211, Genève, Switzerland

^g Universität Hamburg, D-22761, Hamburg, FRG

^h Universität Karlsruhe, D-76021, Karlsruhe, FRG

ⁱ University of California, Los Angeles, CA 90024, USA

^j Universität Mainz, D-55099, Mainz, FRG

^k Universität München, D-80333, München, FRG

^l Carnegie Mellon University, Pittsburgh, PA 15213, USA

^m Centre de Recherches Nucléaires, F-67037, Strasbourg, France

ⁿ Universität Zürich, CH-8057, Zürich, Switzerland

Received 31 October 1994.

Editor: K. Winter

Available online 20 April 2000.

Abstract

A partial-wave analysis of the reaction has been performed using a high-quality high-statistics data set of 712 000 events. In addition to the f₀(975) and f₀(1300), the scalar resonance with mass m = (1500 ± 15) MeV and width Γ = (120 ± 25) MeV is necessary to describe the data.