Light quark spectroscopy at the Fermilab antiproton accumulator

T. Armstrong*, D. Bettoni, V. Bharadwaj, C. Biino, G. Borreani, D. Broemmelsiek, A. Buzzo, R. Calabrese, A. Ceccucci, R. Cester, M. Church, P. F. Dalpiaz, R. Dibenedetto, D. Dimitroyannis, M. G. Fabbri, J. Fast, A. Gianoli, C. Ginsburg, k. Gollwitzer, A. HahnM. A. Hasan, S. Hsueh, R. Lewis, E. Luppi, M. Macri, A. Majewska, M. Mandelkern, F. Marchetto, M. Marinelli, J. Marques, W. Marsh, M. Martini, M. Masuzawa, E. Menichetti, A. Migliori, R. Mussa, M. Pallavicini, S. Palestini, N. Pastrone, C. Patrignani, J. Peoples, L. Pesando, F. Petrucci, M. G. Pia, S. Pordes, P. Rapidis, R. Ray, J. Reid, G. Rinaudo, B. Roccuzzo, J. L. Rosen, A. Santroni, M. Sarmiento, M. Savrie, A. Scalisi, J. Schultz, K. K. Seth, A. Smith, G. A. Smith, M. Sozzi, S. Trokenheim, M. Weber, S. Werkema, Y. Zhang, J. L. Zhao, G. Zioulas

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Fermilab experiment E-760 has confirmed the f2(1520) state in the 3πo final state in antiproton-proton annihilations in-flight (~3.0 to 3.6 GeV c.m. energy), seen previously by Crystal Barrel and other groups at CERN at rest. The f2(1520) is also seen in its 2πo decay mode in the 2πoη channel and 2η decay mode in the πo2η channel. There are indications of this state in the 3η decay channel. The invariant mass spectrum is rich in states near 2 GeV, and amplitude and spin/parity analysis of the Dalitz plot is in progress in this mass region.

Original languageEnglish (US)
Pages (from-to)53-61
Number of pages9
JournalNuclear Physics, Section A
Volume558
Issue numberC
DOIs
StatePublished - Jun 7 1993

Funding

The f#520) state has been observedi n reactions( 1) and (3). Its mass and width have been measuredfo r reaction( 1) and they agreew ith the acceptedv alues 171B. ecauseo f inter-ferencew ith others tatest he f (1520)d oesn ot show up clearly in the Dalitz plot for reaction (21,b ut one can see it in the 6. 4-0.6 slice in Cos(8 *). The samplef or reaction (4) is small, but one does seei ndications of f2(1 520)i n this channel.T he Dalitz plots for the above reactions have many interestion featuresa bove the f2(1520)p eak region, but the amplitude analysis (in progress)i s not straight-forwarda s many highero rderp artialw avesa rep resent. We gratefully acknowledget he technicals upportf rom our collaboratingi nstitutions and the outstandingc ontribution of the Fermilab AcceleratorD ivision Antiproton Department. This work was funded by the U.S. Departmento f Energy, the National ScienceF oundation, and the Italian Istituto Nazionale di Fisica Nucleare.

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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