Hidden charm

In Chapter 12 we will discuss the spectroscopy of hidden charm and bottom or charmonium and bottomonium in which the actual hadrons have charm and bottom quantum number equal zero. However, when one combines a charm or bottom quark with the old light u, d, s quarks, new families of charm or bottom hadrons are predicted to exist. This will be taken up in Chapter 13. 

The very small width of this resonance, F Ci 70 keV (about a factor 1000 smaller than a typical hadronic width), indicates that its decay mode into ordinary hadrons is highly suppressed. This discovery triggered a vast experimental search and stimulated much theoretical work. The present interpretation of the J/ is that it is the first manifestation of a cc bound state ( hidden charm ) occurring below the threshold for charm particle production. 

As compared with the case of hidden charm, discussed in the previous chapters, the spectroscopy of heavy flavoured particles, especially charm... 

A new era in electrochemistiy has begun by the paper of Horiuti and Pol yi. I would encourage everybody to read Pol yi s seminal paper. The reader will be charmed by the intellectual accomplishment and the beauty of science as the hidden laws of the nature suddenly come into light. 

---