Antiproton production in $pp, dp$ and $dd$ collisions close to threshold

Details Antiproton production in $pp, dp$ and $dd$ collisions close to threshold Antiproton production in $pp, dp$ and $dd$ collisions close to threshold

1996-09-06

arxiv.org/abs/nucl-th/9609018v2

Phys.Lett. B387 (1996) 691-696

Physics

Nuclear Physics

Nuclear Theory

10 pages, LaTeX, plus 4 postscript figures, Phys. Lett. B, in press

Scientific paper

10.1016/0370-2693(96)01118-5

The production of antiprotons in $pp$ collisions is investigated close to threshold where experimental data about the total cross section are not available. We analyze the latter reaction within the LUND string model for inclusive $\bar{p}$ production and within the framework of a one-boson exchange model for the exclusive reaction $pp \rightarrow ppp\bar{p}$. The application of our new results to the analysis of subthreshold antiproton production in $d + p$ and $d + d$ collisions shows cross sections that are much lower than expected before. Nevertheless, the comparison of experimental $\bar{p}$ differential cross sections from $d +p$ and $d + d$ is expected to provide valuable information about a nonnucleonic component in the deuteron wavefunction.

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