First search for the ${\eta }_{c2}(1D)$ in $B$ decays at Belle

Abstract

The first dedicated search for the ${\eta }_{c2}(1D)$ is carried out using the decays $B^{+}\to {\eta }_{c2}(1D)K^{+}$, $B^0\to {\eta }_{c2}(1D)K_S^0$, $B^0\to {\eta }_{c2}(1D){\pi }^{-}{K}^{+}$, and $B^{+}\to {\eta }_{c2}(1D){\pi }^{+}{K}_S^0$ with ${\eta }_{c2}(1D)\to h_c\gamma$. No significant signal is found. For the ${\eta }_{c2}(1D)$ mass range between $3795$ and $3845\mathrm{MeV}/c^2$, the branching-fraction upper limits are determined to be $\mathcal{B}(B^{+}\to {\eta }_{c2}(1D)K^{+})\times \mathcal{B}({\eta }_{c2}(1D)\to h_c\gamma )<3.7\times 10^{-5}$, $\mathcal{B}(B^0\to {\eta }_{c2}(1D)K_S^0)\times \mathcal{B}({\eta }_{c2}(1D)\to h_c\gamma )<3.5\times 10^{-5}$, $\mathcal{B}(B^0\to {\eta }_{c2}(1D){\pi }^{-}{K}^{+})\times \mathcal{B}({\eta }_{c2}(1D)\to h_c\gamma )<1.0\times 10^{-4}$, and $\mathcal{B}(B^{+}\to {\eta }_{c2}(1D){\pi }^{+}{K}_S^0)\times \mathcal{B}({\eta }_{c2}(1D)\to h_c\gamma )<1.1\times 10^{-4}$ at 90% C. L. The analysis is based on the 711 ${\mathrm{fb}}^{-1}$ data sample collected on the ${\rm Y}(4S)$ resonance by the Belle detector, which operated at the KEKB asymmetric-energy $e^{+}{e}^{-}$ collider.

arXiv comment23 pages, 8 figures

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Cited by in corpus (4)

• Study on ${\eta }_{c2}({\eta }_{b2})$ electromagnetic decay into double photons
• Search for the ${\eta }_{c2}(1D)$ in $e^{+}{e}^{-}\to \gamma {\eta }_{c2}(1D)$ at $\sqrt{s}$ near 10.6 GeV at Belle
• Two nearby states in the $X(3872)$ region: Resolving the radiative-decay ratio tension with ${\eta }_{c2}$
• Search for $e^{+}{e}^{-}\to \varphi {\chi }_{c0}$ and $\varphi {\eta }_{c2}(1D)$ at center-of-mass energies from 4.47 to 4.95 GeV