Investigation of anomalons in He fragments

Mean free paths and interaction cross-section of α-projectile fragments produced in oxygen-emulsion interaction at 60 GeV/n

“…It is seen that our data confirms the constancy of m.f.p. 's and is supported by most of the recent emulsion results [8][9][10]. Having shown the constancy of m.f.p.…”

“…This is an anomalous behaviour. Other investigators, using the same detectors and techniques, died not get any anomalous behaviour [8][9][10]. Most of these experiments were carried out at about 1-5 GeV/n energy with different projectiles (*) The authors of this paper have agreed to not receive the proofs for correction.…”

Search for a nucleon-participant multiplicity effect on a possible anomalous fragment production

“…Soon, however, the situation appeared to be rather confusing. For instance, concerning Z=2 APF, they were observed in 4.5 A GeV/c 12C interactions [5] but Jain et al [6] reported negative evidence with Ar, Fe, Kr beams of energy ranging between 1 and 2 A GeV. These authors [7], however, reported evidence for the existence of APF with charge greater than 15 following interactions of 1.52AGeVKr in emulsions.…”

Interaction mean free paths of He fragments from 3.7A GeV 16O–emulsion collision

“…On the MFPs of helium PFs in nuclear emulsion, four experiments (Ghosh et al, 1985;Ganssauge et al, 1985;El-Nadi et al, 1984;Zhang et al, 2001) saw positive evidences for a reduced MFP, while the others contradicted them (Singh et al, 1988(Singh et al, , 1990Sengupta et al, 1989;Khan et al, 1989;Jain et al, 1985;Ismail et al, 1984;Bhanja et al, 1985;El-Nadi et al, 1993). To explain the possible existence of anomalons, various theoretical models have been proposed, which include the color polarization of quark states (Romo and Watson, 1979), quasi-molecular nuclear states (Bayman et al, 1982), and the relativistic mean-field theory (Rufa et al, 1987(Rufa et al, , 1990Schaffner et al, 1992;Abou-El-Naga, 1990), etc.…”