A Lattice Study of the Two-photon Decay Widths for Scalar and Pseudo-scalar Charmonium

30 May 2020 Chen Ying Gong Ming Li Ning Liu Chuan Liu Yu-Bin Liu Zhaofeng Ma Jian-Ping Meng Yu Xiong Chao Zhang Ke-Long

In this exploratory study, two photon decay widths of pseudo-scalar ($\eta_c$) and scalar ($\chi_{c0}$) charmonium are computed using two ensembles of $N_f=2$ twisted mass lattice QCD gauge configurations. The simulation is performed two lattice ensembles with lattice spacings $a=0.067$ fm with size $32^3\times{64}$ and $a=0.085$ fm with size $24^3\times{48}$, respectively... (read more)

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  • HIGH ENERGY PHYSICS - LATTICE