From the study of the annihilation at rest <(p)over bar p> --> K+/- K-miss(0) pi(-/+)pi(+)pi(-) the production rates of the eta(1440) --> (KKL0)-K-+/- pi(-/+) were obtained for three different hydrogen target densities: liquid, gaseous at NTP and at low pressure (5 mbar). The rate values are: f(eta(1440)) (LH) = (6.0 +/- 0.5) . 10(-4), f(eta(1440)) (NTP) = (2.9 +/- 0.4) . 10(-4) and f(eta(1440)) (5 mbar) = (1.0 +/- 0.2) . 10(-4). From these results, the density dependence of the annihilation fraction from the S-1(0) protonium level can be extracted directly.

Measurement of the eta(1440)->(KKL0)-K-+/-pi(-/+) production rates from (p)over-bar-p annihilation at rest at three different hydrogen target densities

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

From the study of the annihilation at rest <(p)over bar p> --> K+/- K-miss(0) pi(-/+)pi(+)pi(-) the production rates of the eta(1440) --> (KKL0)-K-+/- pi(-/+) were obtained for three different hydrogen target densities: liquid, gaseous at NTP and at low pressure (5 mbar). The rate values are: f(eta(1440)) (LH) = (6.0 +/- 0.5) . 10(-4), f(eta(1440)) (NTP) = (2.9 +/- 0.4) . 10(-4) and f(eta(1440)) (5 mbar) = (1.0 +/- 0.2) . 10(-4). From these results, the density dependence of the annihilation fraction from the S-1(0) protonium level can be extracted directly.
1996
385
493
499
A. Bertin;M. Bruschi;M. Capponi;S. DeCastro;A. Ferretti;D. Galli;B. Giacobbe;U. Marconi;M. Piccinini;N. SempriniCesari;R. Spighi;S. Vecchi...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/110551
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