New results concerning the detection of (p) over bar d Pontecorvo reactions at rest with hidden and open strangeness in the final state are presented. A very selective 2-prong dedicated trigger has been used to collect a sample of about 8.5 x 10(6) annihilations. Evidence of the reaction (p) over bar d --> phi n is shown with a branching ratio of [5.3 +/- 0.6(stat.) +/- 0.3(syst.)] x 10(-6). Moreover, the reactions (p) over bar d --> Lambda K* and (p) over bar d --> Lambda K-L(0) have been identified through the reconstruction of the decay Lambda(0) --> p pi(-). The preliminary result for the branching ratio is Br((p) over bar d --> Lambda(0)K(L)(0)) = [5 +/- 1(stat.)+/- 2(syst)] x 10(-7).

Strangeness production in (p)over-bar-d Pontecorvo reactions at rest

BALESTRA, Ferruccio;BOTTA, Elena;BRESSANI, Tullio;BUSSA, Maria Pia;BUSSO, Luigi;COSTA, Sergio;FERRERO, Livio;GARFAGNINI, Raffaello;GRASSO, Antonino;MARCELLO, Simonetta;PANZIERI, Daniele;ZOSI, Gianfranco;
1996-01-01

Abstract

New results concerning the detection of (p) over bar d Pontecorvo reactions at rest with hidden and open strangeness in the final state are presented. A very selective 2-prong dedicated trigger has been used to collect a sample of about 8.5 x 10(6) annihilations. Evidence of the reaction (p) over bar d --> phi n is shown with a branching ratio of [5.3 +/- 0.6(stat.) +/- 0.3(syst.)] x 10(-6). Moreover, the reactions (p) over bar d --> Lambda K* and (p) over bar d --> Lambda K-L(0) have been identified through the reconstruction of the decay Lambda(0) --> p pi(-). The preliminary result for the branching ratio is Br((p) over bar d --> Lambda(0)K(L)(0)) = [5 +/- 1(stat.)+/- 2(syst)] x 10(-7).
1996
59
1455
1459
PHI-MESON PRODUCTION; ANNIHILATIONS; ANTIPROTONS
A. Bertin;M. Bruschi;M. Capponi;B. Cereda;S. DeCastro;A. Ferretti;D. Galli;B. Giacobbe;U. Marconi;M. Piccinini;N. SempriniCesari;R. Spighi;S. Vecchi;A. Vezzani;F. Vigotti;M. Villa;A. Vitale;A. Zoccoli;G. Belli;M. Corradini;A. Donzella;E. LodiRizzini;L. Venturelli;A. Zenoni;C. Cicalo;A. Masoni;G. Puddu;S. Serci;P. Temnikov;G. Usai;V. G. Ableev;O. Y. Denisov;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;C. Cavion;U. Gastaldi;M. Lombardi;L. Vannucci;G. Vedovato;A. Andrighetto;M. Morando;R. A. Ricci;G. Bendiscioli;V. Filippini;A. Fontana;P. Montagna;A. Rotondi;A. Saino;P. Salvini;A. Filippi;F. Balestra;E. Botta;T. Bressani;M. P. Bussa;L. Busso;D. Calvo;P. Cerello;S. Costa;F. DIsep;L. Fava;A. Feliciello;L. Ferrero;R. Garfagnini;A. Grasso;A. Maggiora;S. Marcello;N. Mirfakhraee;D. Panzieri;D. Parena;E. Rossetto;F. Tosello;G. Zosi;M. Agnello;F. Iazzi;B. Minetti;G. Pauli;S. Tessaro;L. Santi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/106987
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