Radiative decays of the psi(3684) to new high mass states
1975
Experimental evidence for the existence of the decay psi(3684) ..-->.. ..gamma..chi, chi ..-->.. 4..pi../sup +-/, ..pi../sup +/..pi../sup -/, K/sup +/K/sup -/, and also ..gamma..psi(3095) is presented. There is clear evidence for at least two chi states decaying to hadrons, one at 3.41 +- 0.01 GeV and the other at 3.53 +- 0.02 GeV. The chi(3410) decays into ..pi pi.. and KK and thus must have even spin and parity. There is also evidence for one state decaying to psi..gamma.. at a mass of either 3.50 +- 0.01 GeV or 3.27 +- 0.01 GeV. The data, taken together, indicate the existence of at least three chi states.
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