Lattice calculation of χc0→2γ decay width

被引：0
|
作者：
邹作恒 [1 ]
孟雨 [1 ,2 ]
刘川 [1 ,2 ,3 ]
机构：
[1] School of Physics, Peking University
[2] Center for High Energy Physics, Peking University
[3] Collaborative Innovation Center of Quantum Matter
来源：
Chinese Physics C | 2022年 / 05期
关键词：
D O I：
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中图分类号：
O572.243 [];
学科分类号：
070202 ;
摘要：
We perform a lattice QCD calculation of the χ→2γ decay width using a model-independent method that does not require the momentum extrapolation of corresponding off-shell form factors.The simulation is performed on ensembles of N=2 twisted mass lattice QCD gauge configurations with three different lattice spacings.After the continuum extrapolation,the decay width is obtained to be Γ(χ)=3.65(83)(21)(66)keV.Regardless of this large statistical error,our result is compatible with the experimental results within 1.3σ.Potential improvements of the lattice calculation in the future are also discussed.
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页码：22 / 30
页数：9
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