H. Shimizu

Precursor of chiral symmetry restoration in the nuclear medium

Spectral enhancement near the

A study of the ηπ+π− channel produced in central pp interactions at 450 GeV/c

{2m}_{ensuremath{pi}}

A Kinematical selection of glueball candidates in central production

threshold in the

A partial wave analysis of the centrally produced

Iphantom{rule{0ex}{0ex}}=phantom{rule{0ex}{0ex}}Jphantom{rule{0ex}{0ex}}=phantom{rule{0ex}{0ex}}0

K^{+}K^{-}

channel in nuclei is shown to be a distinct signal of the partial restoration of chiral symmetry. The relevance of this phenomenon with the possible detection of

and

2{ensuremath{pi}}^{0}

K^{0}_{s}K^{0}_{s}

and

systems in pp interactions at 450 GeV/c and new information on the spin of the

2ensuremath{gamma}

f_{1}

in hadron-nucleus and photon-nucleus reactions is discussed.

(1710)

The reaction pp ->pf (eta eta) ps has been studied at 450 GeV/c. For the first time a partial wave analysis of the centrally produced eta eta system has been performed. Signals for the f0(1500), f0(1710) and f2(2150) are observed and the decay branching fractions of these states are determined.