Observation of a scalar resonance decaying to π+π-π0π0 in pp annihilation at rest

C. Amsler, D. S. Armstrong, I. Augustin, C. A. Baker, B. M. Barnett, C. J. Batty, K. Beuchert, P. Birien, P. Blüm, R. Bossingham, K. Braune, J. Brose, D. V. Bugg, M. Burchell, T. Case, A. Cooper, K. M. Crowe, T. Degener, H. P. Dietz, S. von DombrowskiM. Doser, W. Dünnweber, D. Engelhardt, M. Englert, M. A. Faessler, C. Felix, G. Folger, R. Hackmann, R. P. Haddock, F. H. Heinsius, N. P. Hessey, P. Hidas, P. Illinger, D. Jamnik, Z. Jávorfi, H. Kalinowsky, B. Kämmle, T. Kiel, J. Kisiel, E. Klempt, M. Kobel, H. Koch, C. Kolo, K. Königsmann, M. Kunze, R. Landua, J. Lüdemann, H. Matthäy, M. Merkel, J. P. Merlo, C. A. Meyer, L. Montanet, A. Noble, F. Ould-Saada, K. Peters, C. N. Pinder, G. Pinter, S. Ravndal, J. Salk, A. H. Sanjari, E. Schäfer, B. Schmid, P. Schmidt, S. Spanier, C. Straßburger, U. Strohbusch, M. Suffert, D. Urner, C. Völcker, F. Walter, D. Walther, U. Wiedner, N. Winter, J. Zoll, B. Zou, Č Zupančič

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

We report an analysis of pp annihilation at rest into ρ{variant}+ρ{variant}-π0 leading to the final state π+π- 0. A strong signal is observed for a scalar resonance with mass 1374 ± 38 MeV/c2 and width 375 ± 61 MeV/c2, decaying to ρ{variant}+ρ{variant}-. The resonance in ρ{variant}+ρ{variant}- represents 2.0 ± 0.3% of all pp annihilation at rest. It is also observed to decay into two S-wave dipions (π+π-) (π0π0)). Under the assumption of isospin 0, this is probably f{hook}0(1400), seen for the first time in its 4π decay mode.

Original languageEnglish
Pages (from-to)431-440
Number of pages10
JournalPhysics Letters B
Volume322
Issue number4
DOIs
Publication statusPublished - Feb 24 1994

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Fingerprint Dive into the research topics of 'Observation of a scalar resonance decaying to π<sup>+</sup>π<sup>-</sup>π<sup>0</sup>π<sup>0</sup> in pp annihilation at rest'. Together they form a unique fingerprint.

  • Cite this

    Amsler, C., Armstrong, D. S., Augustin, I., Baker, C. A., Barnett, B. M., Batty, C. J., Beuchert, K., Birien, P., Blüm, P., Bossingham, R., Braune, K., Brose, J., Bugg, D. V., Burchell, M., Case, T., Cooper, A., Crowe, K. M., Degener, T., Dietz, H. P., ... Zupančič, Č. (1994). Observation of a scalar resonance decaying to π+π-π0π0 in pp annihilation at rest. Physics Letters B, 322(4), 431-440. https://doi.org/10.1016/0370-2693(94)91176-2