A search for axial vectors in anti-p.p -> K+-.Kmiss0.pi+-.pi+.pi- annihilations at rest in gaseous hydrogen at NTP
- A. Bertin
- M. Bruschi
- M. Capponi
- A. Collamati
- S. De Castro
- R. Donà
- A. Ferretti
- D. Galli
- B. Giacobbe
- U. Marconi
- M. Piccinini
- N. Semprini-Cesari
- R. Spighi
- S. Vecchi
- A. Vezzani
- F. Vigotti
- M. Villa
- A. Vitale
- A. Zoccoli
- M. Corradini
- A. Donzella
- E. Lodi Rizzini
- L. Venturelli
- A. Zenoni
- C. Cicaló
- A. Lai
- A. Masoni
- L. Musa
- G. Puddu
- S. Serci
- P.P. Temnikov
- G. Usai
- O.E. Gorchakov
- S.N. Prakhov
- A.M. Rozhdestvensky
- M.G. Sapozhnikov
- V.I. Tretyak
- M. Poli
- P. Gianotti
- C. Guaraldo
- A. Lanaro
- V. Lucherini
- F. Nichitiu
- C. Petrascu
- A. Rosca
- V. Ableev
- C. Cavion
- U. Gastaldi
- M. Lombardi
- G. Maron
- L. Vannucci
- G. Vedovato
- G. Bendiscioli
- V. Filippini
- A. Fontana
- P. Montagna
- A. Rotondi
- A. Saino
- P. Salvini
- C. Scoglio
- F. Balestra
- E. Botta
- T. Bressani
- M.P. Bussa
- L. Busso
- D. Calvo
- P. Cerello
- S. Costa
- O. Denisov
- L. Fava
- A. Feliciello
- L. Ferrero
- A. Filippi
- R. Garfagnini
- A. Grasso
- A. Maggiora
- S. Marcello
- D. Panzieri
- D. Parena
- E. Rossetto
- F. Tosello
- L. Valacca
- M. Agnello
- F. Iazzi
- B. Minetti
- G. Pauli
- S. Tessaro
- L. Santi
DOIAbstract
The study of the K±Kmiss0π∓π+π− channel (7016 events), from annihilations in a gaseous hydrogen target at NTP, with the OBELIX spectrometer at LEAR (CERN), is presented. A spin-parity analysis provides evidence for two axial vectors, one in the low mass region, the well established f1(1285), decaying to a0(980)π, the second, the 1++ component of the old puzzling , the f1(1420), decaying mainly to , seen for the first time in annihilation at rest. The analysis confirms the dominant production of the pseudoscalar η(1405), decaying mainly to , and the existence of a second pseudoscalar in the same mass region, the η(1460), decaying mainly to
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