J. Barlow

Antiproton-proton annihilation into (KK + 3π) and (KK + 4π) at 1.2 GeV/c study of the DO properties

Experimental results are presented for the five- and six-body annihilations pp → KK3π and pp → KK 4π of 1.2 GeV/c antiprotons. Analysis of these results in terms of production of K∗(890), ϱ, ω, η and D(1280) resonances is made. A detailed analysis of the quantum numbers for the D-meson is given.

ANTIPROTON--PROTON ANNIHILATION INTO (KantiK + 3

Experimental results are presented for the five- and six-body annihilations pp → KK3π and pp → KK 4π of 1.2 GeV/c antiprotons. Analysis of these results in terms of production of K∗(890), ϱ, ω, η and D(1280) resonances is made. A detailed analysis of the quantum numbers for the D-meson is given.

pi

Abstract Evidence from the K K decay mode for the splitting of the A 2 meson is presented.

) AND (KantiK + 4

Abstract Experimental results are presented on the reactions p p → K 1 O K 1 O π + π − and p p → K 1 O K 2 O π + π − at 0.7 GeV /c . The production of K∗, S∗, fO, ϕ, ϱ is observed, as well as the recently proposed F1 meson: its spin-parity quantum numbers are discussed.

pi

Abstract Experimental results are presented on the reactions p p → K 1 O K 1 O π + π − and p p → K 1 O K 2 O π + π − at 0.7 GeV /c . The production of K∗, S∗, fO, ϕ, ϱ is observed, as well as the recently proposed F1 meson: its spin-parity quantum numbers are discussed.

) AT 1.2 GeV/c STUDY OF THE D

Abstract Experimental results are presented and discussed for the K 0 1 K 0 1 system threshold, with evidence for the presence of the S ∗ and the f 0 messons.

sup 0

Abstract Evidence is presented for the existence of a non-strange isospin 1 meson with mass Mo ≈ 1540 MeV and width Γo ≈ 40 MeV decaying into K∗ K and K ∗ K. Spin-parities preferred are 2− and 1+ (1).

PROPERTIES.

Abstract The mean life of the short lived neutral kaon is found to be 0.856 × 10−10 sec, using a sample of 19 990 events. The mean lives of neutral kaons of known initial strangeness are also measured.