Deuteron-Deuteron Interactions at Six Laboratory Momenta from 680 to 2120 MeV/c

Abstract

Deuteron-deuteron scattering is the simplest example of a collision between two composite nuclear systems. Its experimental study provides a test of features predicted by multiple nuclear scattering theories that can be made only when both projectile and target are composite. There are several theoretical approaches to this problem 1 " 5 and we compare our data with some of these that have been applied specifically to elastic dd scattering. 6 " 8 Previous studies have been made of particle-deuteron collisions (pd,pd,ird, Kd) where the Glauber multiple-scattering theory, 2 with a recent extension which takes into account the quadrupole deformation of the deuteron, 9 has proved quite successful. 10,11 We find that the Glauber theory is also qualitatively correct in interpreting dd elastic scattering, but more detailed theoretical calculations must be done before quantitative success can be claimed. Such studies, applied to composite systems of familiar particles, may help in formulating theoretical models which treat hadron-hadron scattering as collisions between composite systems of unknown subparticles. 12The elastic and total cross sections for deuteron-deuteron interactions at 680, 920, 1180, 1500, 1750, and 2120 MeV/c are presented. The data are compared with theoretical calculations and shown to be in qualitative agreement with predictions based on the Glauber multiple-scattering formalism. In particular the existence of large-angle deuteron-deuteron elastic scattering provides evidence for the "simultaneous" scattering amplitudes predicted by the Glauber theory.

Elastic Scattering between Composite Nuclei at High Energy

“…Experimentally there are only the differential cross sections for deuteron-deuteron scattering up to 2.1 Ge V / c incident momentum. 3 > From this experiment it can be found that the differential cross section is divided into two regions, one is the sharp forward peak and the other has much weaker dependence on the momentum transfer. In the latter region, it has already been shown by several authors 3 >-5 > that the differential cross section is dominated by a new type of double scattering, named "simultaneous" or "abnormal" scattering, which does not appear in proton-deuteron scattering.…”

“…In these mechanisms, D 2 , has already been studied and was named "simul- taneous scattering " 3 ) or "abnormal scattering." 4 l They may rather be considered to have a collective nature in the sense that the whole nucleons are concerned with these processes.…”

“…InFig. 2 (a), the experimental data on deuteron-deuteron scattering3 ) is compared with the calculation.T'he cross sections dO'<A) (ni) I d4 2 for each interaction mechanism ni are given as (3·1)at Serials Rec-Acq Dept/University of Cincinnati on April 1…”

Deuteron and anti-deuteron production in e+e− collisions at the Z resonance

“…The anti-deuteron nucleus total absorption cross section was then obtained by multiplying this by the factor A 2/3 where A is the atomic weight of the target nucleus. Such an A dependence was roughly observed to describe the deuteron-nucleus measurements [34][35][36]. This method gave 24% for the fraction of anti-deuterons lost by nuclear interactions.…”