Author:
Chen Ying,Gong Ming,Li Ning,Liu Chuan,Liu Yu-Bin,Liu Zhaofeng,Ma Jian-Ping,Meng Yu,Xiong Chao,Zhang Ke-Long
Abstract
Abstract
This exploratory study computes two-photon decay widths of pseudo-scalar (
) and scalar (
) charmonium using two ensembles of
twisted mass lattice QCD gauge configurations. The simulation is performed using two lattice ensembles with lattice spacings
fm with size
and
fm with size
. The decay widths for the two charmonia are obtained within the expected ballpark, but are however smaller than the experimental ones. Possible reasons for these discrepancies are discussed.
Subject
Astronomy and Astrophysics,Instrumentation,Nuclear and High Energy Physics
Cited by
7 articles.
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