New pseudoscalar particle having no explanation in standard model detected?

Thanks for Wilhelmus de Wilde for a link to a popular article in Schitechdaily telling about completely unexpected finding by by a team led by professors Tacemichi Okui and Kohsaku Tobioka. The decay of longlived kaon K_L suggests the existence of new longlived particle with quantum numbers of axion – or equivalently pion. The finding is published in Physical Review Letters (see this). Standard model cannot explain this kind of particle.

A rough estimate for mass is not far from pion mass. There exists earlier evidence that pion has mass spectrum. Could an excitation of pion be involved?

This is actually not new. The experimental claim of Tatischeff and Tomasi-Gustafsson (see this ) is that pion is accompanied by pion like states organized on Regge trajectory and having mass 60, 80, 100, 140, 181, 198, 215, 227.5, and 235 MeV means that besides pion also other pion like states should be there. Similar satellites have been observed for nucleons with ground state mass 934 MeV: the masses of the satellites are 1004, 1044, 1094 MeV. Also the signal cross sections for Higgs to gamma pairs at LHC suggest the existence of several pion and spion like states, and this was the reason why I decided to again the search for data about this kind of states. Their possible interpretation in TGD framework is discussed in here.

One explanation could be that the states correspond to “infrared Regge trajectories” of pion related to the structure of its magnetic body. Genuine Regge trajectories would have slope of about GeV and now the slope less than 10 per cent of this, which conforms with the ratio of fine structure constant to coupling strength. IR trajectories would be associated with the electromagnetic body and ordinary Regge trajectories with the color magnetic body.

See the chapter New Physics Predicted by TGD: Part I .

For a summary of earlier postings see Latest progress in TGD.

Articles and other material related to TGD.