1302.3331 (Y. K. Hsiao et al.)

Identifying Glueball at 3.02 GeV    [PDF]

Y. K. Hsiao, C. Q. Geng

We examine the nature of the unknown enhancement around 3 GeV observed by the BABAR collaboration in the $m_{p\bar p}$ spectrum of the $\bar B^0\to p\bar p D^0$ decay. After demonstrating that the peak can be neither identified as a charmonium state, such as $\eta_c$ or $J/\psi$, nor classified as one of the light-flavor mesons, we conclude that it corresponds to a glueball fitted as X(3020) with $(m_X,\;\Gamma_X)=(3020\pm 8,\; 103\pm 3)\;\text{MeV}$, which could be the first glueball state above 3 GeV.

View original: http://arxiv.org/abs/1302.3331