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Radiative transitions in charmonium from N_f=2 twisted mass lattice QCD

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arxiv 1104.2655 v1 pith:CZUEHBZL submitted 2011-04-14 hep-lat hep-ph

Radiative transitions in charmonium from N_f=2 twisted mass lattice QCD

Ying Chen , De-Chuan Du , Bao-Zhong Guo , Ning Li , Chuan Liu , Hang Liu , Yu-Bin Liu , Jian-Ping Ma
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Xiang-Fei Meng Zhi-Yuan Niu Jian-Bo Zhang
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classification hep-lat hep-ph
keywords latticegammarightarrowcharmoniummassradiativeresultstransitions
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present a study for charmonium radiative transitions: $J/\psi\rightarrow\eta_c\gamma$, $\chi_{c0}\rightarrow J/\Psi\gamma$ and $h_c\rightarrow\eta_c\gamma$ using $N_f=2$ twisted mass lattice QCD gauge configurations. The single-quark vector form factors for $\eta_c$ and $\chi_{c0}$ are also determined. The simulation is performed at a lattice spacing of $a= 0.06666$ fm and the lattice size is $32^3\times 64$. After extrapolation of lattice data at nonzero $Q^2$ to 0, we compare our results with previous quenched lattice results and the available experimental values.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Charmonium radiative transitions to dileptons from lattice QCD: The case of $h_c \to \eta_c \ell^+\ell^-$ and $\chi_{c1} \to J/\psi\,\ell^+\ell^-$

    hep-lat 2026-04 unverdicted novelty 8.0

    First fully dynamical lattice QCD yields Γ(h_c → η_c e⁺e⁻) = 5.45(19) keV (3σ above BESIII) and Γ(χ_c1 → J/ψ e⁺e⁻) = 2.869(90) keV, with continuum-extrapolated results and q² distributions.

  2. Extraction of charmonium branching fractions from $J/\psi\to\gamma\eta_c$ radiative decays

    hep-ph 2026-06 unverdicted novelty 5.0

    Proposes new photon line shape and branching fraction extraction method for J/psi to gamma eta_c, claiming compatibility between PDG data correlations and lattice QCD widths via profile scan.

  3. Production Rate of Glueball-like $X(2370)$ in $J/\psi$ Radiative Decay

    hep-ph 2026-05 unverdicted novelty 5.0

    Mixing with a small angle between the pseudoscalar glueball and η_c can increase Br(J/ψ → γ X(2370)) well above the pure-glueball value of 2.3(8)×10^{-4}.

  4. Mechanical distribution of the pseudoscalar charmonium and bottomonium on the light-front

    hep-ph 2026-06 unverdicted novelty 4.0

    Light-front quark model calculations with two Gaussian wave functions yield transverse mechanical distributions for pseudoscalar charmonium and bottomonium, showing a nodal pressure and positive force.