Study of B-meson decays to eta_c K^(*), eta_c(2S) K^(*) and eta_c gamma K^(*)

Abstract

We study two-body $B$-meson decays to a charmonium state (${\eta }_c$, ${\eta }_c(2S)$ or $h_c$) and a $K^{+}$ or $K^{\ast 0}(892)$ meson using a sample of $349f{b}^{-1}$ of data collected with the BABAR detector at the PEP-II asymmetric-energy $B$ Factory at SLAC. We measure $BR(B^0\to {\eta }_c{K}^{\ast 0})=(5.7\pm 0.6(stat)\pm 0.9(syst))\times 10^{-4}$, $BR(B^0\to {\eta }_c(2S)K^{\ast 0})<3.9\times 10^{-4}$, $BR(B^{+}\to h_c{K}^{+})\times BR(h_c\to {\eta }_c\gamma )<4.8\times 10^{-5}$ and $BR(B^0\to h_c{K}^{\ast 0})\times BR(h_c\to {\eta }_c\gamma )<2.2\times 10^{-4}$ at the 90% C.L., and $BR({\eta }_c(2S)\to K\bar{K}\pi )=(1.9\pm 0.4(stat)\pm 1.1(syst))$. We also measure the mass and width of the ${\eta }_c$ meson to be $m({\eta }_c)=(2985.8\pm 1.5(stat)\pm 3.1(syst))MeV/c^2$ and $\Gamma ({\eta }_c)=(36.3_{-3.6}^{+3.7}(stat)\pm 4.4(syst))MeV$.

8 pages, 8 figures, submitted to Phys. Rev. D

References in corpus (6)

• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• The Cosmological Parameters 2006
• Observation of the ^1P_1 State of Charmonium
• Two-photon width of eta_c and eta'_c from Heavy-Quark Spin Symmetry
• Search for the h_c meson in B^+- ->h_c K^+-
• Search for Factorization-Suppressed B -> chi_c K(*) Decays

Cited by in corpus (20)

• Heavy quarkonium: progress, puzzles, and opportunities
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of summer 2016
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2018
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2021
• Charm and strange quark masses and $f_{D_s}$ from overlap fermions
• Study of B^{+-} -> K^{+-}(K_S K pi)^0 Decay and Determination of eta_c and eta_c(2S) Parameters
• Probing the $P$-wave charmonium decays of $B_c$ meson
• $S$, $P$ and $D$-wave resonance contributions to $B_{(s)}\to {\eta }_c(1S,2S)K\pi$ decays in the perturbative QCD approach
• Study of charmonium production in $b$-hadron decays and first evidence for the decay $B_s^0\to \varphi \varphi \varphi$
• Search for psi(2S) -> gamma eta_c(2S) via fully reconstructed eta_c(2S) decays
• Search for the ${\eta }_c(2S)/h_c\to p\bar{p}$ decays and measurements of the ${\chi }_{cJ}\to p\bar{p}$ branching fractions
• Physics Accomplishments and Future Prospects of the BES Experiments at the BEPC Collider
• New puzzle in charmonium decays
• Study of charmonium decays to $K_S^{0}K\pi$ in the $B\to (K_S^{0}K\pi )K$ channels
• Evidence for $B^{+}\to h_c{K}^{+}$ and observation of ${\eta }_c(2S)\to p\bar{p}{\pi }^{+}{\pi }^{-}$
• Updated measurements of the M1 transition $\psi (3686)\to \gamma {\eta }_c(2S)$ with ${\eta }_c(2S)\to K\bar{K}\pi$
• Measurement of eta_c(1S), eta_c(2S) and non-resonant eta' pi+ pi- production via two-photon collisions
• $B_{(s)}\to {\eta }_c(P,V)$ decays and effects of the next-to-leading order contributions in the perturbative QCD approach
• Revisiting nonfactorizable contributions to factorization-forbidden decays of $B$ mesons to charmonium
• An Experimental Review of Charmonium