Radiative transition for χc0 → J/Ψγ from Nf = 2 twisted mass lattice QCD

Ning Li; Chao-Chen Liu; Ya-Jie Wu

doi:10.1209/0295-5075/133/11001

All issues

Volume 133 / No 1 (January 2021)

EPL, 133 1 (2021) 11001

Abstract

Issue		EPL Volume 133, Number 1, January 2021


Article Number		11001
Number of page(s)		6
Section		Statistical physics and networks
DOI		https://doi.org/10.1209/0295-5075/133/11001
Published online		05 March 2021

EPL, 133 (2021) 11001

Radiative transition for χ_c0 → J/Ψγ from N_f = 2 twisted mass lattice QCD

Ning Li^(a), Chao-Chen Liu and Ya-Jie Wu

School of Sciences, Xi'an Technological University - Xi'an 710032, PRC

^(a) E-mail: lining@xatu.edu.cn

Received: 9 July 2020
Accepted: 23 November 2020

Abstract

Radiative transition decay width for $\chi_{c0}\rightarrow{J/\Psi\gamma}$ was calculated by using $N_f=2$ twisted mass lattice quantum chromodynamics gauge configurations in this preliminary study. The simulation has been performed on lattices with lattice spacings $a=0.067\ \text{fm}$ and lattice size $32^3\times{64}$ (Ens.C₁), and $a=0.085\ \text{fm}$ and lattice size $24^3\times{48}$ (Ens.B₁) respectively. In this simulation, we have considered the parity mixing effect by using variational method. The calculated central value for the decay width is closer to the experimental data than that in previous lattice studies.

PACS: 12.38.Gc – Lattice QCD calculations / 11.15.Ha – Lattice gauge theory

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