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The issue of whether $^{42}_{14}Si_{28}$ is doubly magical or not has been acontentious one. Fridmann {\it et al.} (Nature 435 (2005) 922) through studiesof two-proton knockout reaction $^{44}_{16}S_{28} \rightarrow^{42}_{14}Si_{28}$, presented a strong empirical evidence in support ofmagicity and sphericity of $^{42}_{14}Si_{28}$. However in complete conflictwith this, Bastin {\it et al.} (Phys. Rev. Lett. 99 (2007) 022503) gave equallystrong empirical evidences, to show that the N = 28 magicity had completelycollapsed, and that $^{42}_{14}Si_{28}$ was a well deformed nucleus. At presentthe popular consensus (Gade {\it et al.}, Phys. Rev. Lett. 122 (2019) 222501)strongly supports the latter one and discards the former one. Here, while weaccept the latter experiment as being fine and good, through a careful study ofan RMF model calculation, we show that actually the experimental results ofFridmann are also independently good and consistent. As per the Fridmannexperiment, the sphericity and magicity of $^{42}_{14}Si_{28}$ is manifestedonly through proton number Z=14 being a strong magic number, while the neutronmagic number N=28 disappears (or goes into hiding); and still this nucleus isspherical. This is a new and amazing property manifesting itself in this exoticnucleus $^{42}_{14}Si_{28}$. In this paper we provide a consistentunderstanding of this novel reality within a QCD based model. This model, whichhas been successful in explanation of the halo phenomenon in exotic nuclei,comes forward to provide the physical reason as to why the Fridmann experimentis correct. This QCD based model shows that it is tritons, as elementary entitymaking up $^{42}_{14}Si_{28}$, which then provides consistency to the aboveamazing conclusions arising from the Fridmann experiment.

Towards a consistent understanding of the exotic nucleus $^{42}_{14}Si_{28}$