Russians at the JINR Nuclotron believe they have found a new particle, the E(38), as reported in this paper at ArXiv. The particle interacts with quarks and gluons only and appears in collisions on nucleii. It
decays to two photons, and its width (inverse of decay rate) is less than 3 MeV.
Early papers had claimed evidence of the particle as long ago as 2008, using data from the BaBar experiment, but it had not been widely reported. The new results are confirmation of this analysis, are heavy on the graphs, which clearly show a 38MeV peak in two photon events.
The first paper claims the particle is Higgs like, coupling to quarks in proportion to there mass, but it is two early to confirm that. The new particle is not one expected by the standard model, and doesn't have to good match to a theorectically expected particle.
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