An enhancement of antiprotons produced in p + d reaction in comparison with ones in p + p elementary reaction is investigated. In the neighborhood of subthresh-old energy the enhancement is caused by the difference of available energies for antiproton production. The cross section in p + d reaction, on the other hand, becomes just twice of the one in elementary p + p reaction at the incident en...

Proton and oxygen-17 nmr relaxation rates of C D 3 1 7 O H as well as deuteron nmr relaxation rates of C H 3 O D were measured in mixtures with carbon tetrachloride at different compositions and temperatures. By varying the 1 0-content different contributions to the proton relaxation rate could be separated and from the 1 7 0 H dipolar interaction contribution the correlation time of the O H bo...

We investigate polarized deuteron structure functions at small values of the Bjorken variable, x < 0.1. In this region contributions from the coherent interaction of diffractively excited hadronic states with both nucleons become important. A proper treatment of this process requires an extension of the Glauber-Gribov multiple scattering theory to include spin degrees of freedom. In the kinemat...

A suggestion is made for distinguishing 2N and 6q short range correlations within the deuteron. The suggestion depends upon observing high momentum backward nucleons emerging from inelastic electromagnetic scattering from a deuteron target. A simple model is worked out to see the size of effects that may be expected.

The empirical-phenomenological quasi-deuteron photofission description is theoretically justified within the semiclassical, intermediate statistics model. The transmutational fermion (nucleon) boson (quasi-deuteron) potential plays an essential role in the present context and is expressed in terms of thermodynamical and of microscopical quantities, analogous to those commonly used in the superf...

We introduce generalized quark and gluon distributions in the deuteron, which can be measured in exclusive processes like deeply virtual Compton scattering and meson electroproduction. We discuss the basic properties of these distributions and point out how they probe the interplay of nucleon and parton degrees of freedom in the deuteron wave function.

The Wide Angle Shower Apparatus (WASA) has been transferred from the storage ring CELSIUS (TSL, Uppsala, Sweden) to the cooler synchrotron COSY (FZ Jülich, Germany). In this presentation, the status and planning of the WASAatCOSY project are reported. The main physics aspects are rare decays of η and η' mesons and isospin violation in deuteron-deuteron interactions.