ITA
ENG

PROTONIUM ANNIHILATION INTO KSKL AT 3 DIFFERENT TARGET DENSITIES

Authors

BERTIN A BRUSCHI M CAPPONI M COLLAMATI A DANTONE I DECASTRO S DONA R FERRETTI A GALLI D GIACOBBE B MARCONI U MASSA I PICCININI M POLI M SEMPRINICESARI N SPIGHI R VECCHI S VEZZANI A VIGOTTI F VILLA M VITALE A ZOCCOLI A ZENONI A CORRADINI M DONZELLA A RIZZINI EL VENTURELLI L CICALO C MASONI A PUDDU G SERCI S TEMNIKOV PP USAI G GORCHAKOV OE PRAKHOV SN ROZHDESTVENSKY AM GUARALDO C LANARO A LUCHERINI V SAPOZHNIKOV MG TRETYAK VI GIANOTTI P NICHITIU F PETRASCU C ROSCA A ABLEEV VG CAVION C GASTALDI U LOMBARDI M MARON G VANNUCCI L VEDOVATO G MORANDO M BENDISCIOLI G FILIPPINI V FONTANA A MONTAGNA P ROTONDI A SAINO A SALVINI P BALESTRA F BOTTA E BRESSANI T BUSSA MP BUSSO L CALVO D CERELLO P COSTA S FELICIELLO A FERRERO L FILIPPI A GARFAGNINI R GRASSO A MAGGIORA A MARCELLO S MIRFAKHRAI N PANZIERI D PARENA D ROSSETTO E TOSELLO F AGNELLO M IAZZI F MINETTI B PAULI G TESSARO S SANTI L

Citation

A. Bertin et al., PROTONIUM ANNIHILATION INTO KSKL AT 3 DIFFERENT TARGET DENSITIES, Physics letters. Section B, 386(1-4), 1996, pp. 486-494

Citations number

Categorie Soggetti

Physics

Journal title

Physics letters. Section B → ACNP

ISSN journal

03702693

Volume

386

Issue

1-4

Year of publication

1996

Pages

486 - 494

Database

ISI

SICI code

0370-2693(1996)386:1-4<486:PAIKA3>2.0.ZU;2-Z

Abstract

The frequency of the protonium annihilation channel <(p)over bar p> -- > KSKL has been measured at three different target densities: liquid h ydrogen (LH), gaseous hydrogen at NTP conditions and gaseous hydrogen at low pressure (5 mbar). The obtained results are: f(<(p)over bar p> --> KSKL, LH) = (7.8 +/- 0.7(stat) +/- 0.3(sys)) x 10(-4), f(<(p)over bar p> --> KSKL, NTP) = (3.5 +/- 0.5(stat) +/- 0.2(sys)) x 10(-4) and f(<(p)over bar p> --> KSKL, 5 mbar) = (1.0 +/- 0.3(stat) +/- 0.1(sys)) x 10(-4). Since the KSKL final state can be originated only from the S-3(1) initial state, these values give direct information on the scal ing of the protonium spin-triplet S-wave annihilation probability with the density.