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### X Boson as Evidence for Nuclear String Model

#### Abstract

A new nuclear physics anomaly has been discovered in the decays of the excited state

^{8}Be* of an unstable isotope of^{8}Be (4 protons and 4 neutrons) to ground state^{8}Be. The anomaly manifests itself as a bump in the distribution of*e*^{+}*e*^{-}pairs in the transitions^{8}Be* à^{8}Be at certain angle between electrons. The proposed interpretation is in terms of a production of spin 1 boson - christened as*X*- identified as a carrier of fifth force with range about 12 fm, nuclear length scale. The attribute 6.8σ tells that the probably that the finding is statistical fluctuation is about 10^{12}: already 5σ is regarded as a criterion for discovery. TGD inspired interpretation based on nuclear string model is different. The mass of the state is within .7 accuracy pion mass scaled down to nuclear*p*-adic scale*k*=113. Scaled down pion in*l*= 1 state is possible and allows to scale the decay rates to gamma pair and*e*^{+}*e*^{-}pair from those of pion. Somewhat surprisingly, it turned out that the predicted decay width*Γ*(*π*(113),*γγ*) is consistent with the experimental bounds. The problem is that*Γ*(*π*(113),*γγ*) is at least by a factor of order 1/100 too low. A possible solution of the problem is that*f*does not scale like_{π}*p*-adic mass scale but decreases faster. Another possibility is provided by the hierarchy of Planck constants*h*=_{eff}*n*x*h*labelling dark matter phases. The mechanism for the decay as snipping of closed pionic flux loop from colored flux tube connecting nucleus is discussed.