Ramello, Luciano
nucl-ex
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A Search for weakly interacting neutral particles in missing energy events in 450-GeV/c p N collisions

The HELIOS collaboration Åkesson, T. ; Almehed, S. ; Angelis, A.L. S. ; et al.
Z.Phys.C 52 (1991) 219-226, 1991.
Inspire Record 302922 DOI 10.17182/hepdata.15014

We have measured the inclusive cross-section as a function of missing energy, due to the production of neutrinos or new weakly interacting neutral particles in 450 GeV/c proton-nucleus collisions, using calorimetric measurements of visible event energy. Upper limits are placed on the production of new particles as a function of their energy. These upper limits are typically an order

9 data tables
Table 1

Differential single diffraction cross section.

Table 2

Differential single diffraction cross section.

Table 3

Differential single diffraction cross section.

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Electromagnetic Dissociation of 200-{GeV}/$N ^{16}$O and $^{32}$S Ions in Nuclear Emulsions

Baroni, G. ; Bisi, V. ; Breslin, A.C. ; et al.
Nucl.Phys.A 516 (1990) 673-714, 1990.
Inspire Record 294682 DOI 10.17182/hepdata.36830

This work represents the results of an experimental investigation of the electromagnetic dissociation of 200 GeV/nucleon 16 O and 32 S ions in nuclear emulsions. Exclusive channels involving charged fragments have been studied as a function of the energy released, and, assuming a Weizsäcker-Williams spectrum of virtual photons, there is a good agreement with results for the (γ, p) processes obtained with real photons. However, the rates found for other processes are larger, in particular for the (γ, α) on both nuclei. The values of the total integrated absorption cross sections are generally larger than those obtained from real photon experiments but the extent of the discrepancy depends strongly upon which photon results are used in the comparison.

6 data tables
Table 1

ELECTROMAGNETIC DISSOCIATION IN NUCLEAR EMULSION.

Table 2

ELECTROMAGNETIC DISSOCIATION IN NUCLEAR EMULSION.

Table 3

NUCLEUS IS THE EMULSION.

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