Further study of the helicity selection rule evading mechanism in ${\eta }_c$, ${\chi }_{c0}$ and $h_c$ decaying to baryon anti-baryon pairs

Abstract

We investigate the long distance contribution via charmed hadron loops in the processes ${\eta }_c$, ${\chi }_{c0}$ and $h_c$ decaying to baryon anti-baryon pairs, which are supposed to be highly suppressed by the helicity selection rule as a consequence of the perturbative QCD framework. With an effective Lagrangian method, our estimation result indicates that such hadron loops play an important role in these hadronic decays. It is a further test of the evading mechanism for the helicity selection rule in charmonium baryon-antibaryon decays.

arXiv comment9 pages, 7 figures, to appear in J. Phys. G

References in corpus (27)

• Rigorous QCD Analysis of Inclusive Annihilation and Production of Heavy Quarkonium
• Automatized One-Loop Calculations in 4 and D dimensions
• Phenomenology of Heavy Meson Chiral Lagrangians
• Soft-core hyperon-nucleon potentials
• Charmonium
• Final State Interactions in Hadronic B Decays
• Color-octet quarkonia production
• Color-octet quarkonia production II
• Soft-core baryon-baryon potentials for the complete baryon octet
• Nonfactorizable contributions in B decays to charmonium: the case of $B^{-}\to K^{-}{h}_c$
• $B^{-}\to K^{-}{\chi }_{c0}$ decay from charmed meson rescattering
• Charmonium dissociation in hadronic matter
• Measurements of h_c(^1P_1) in psi' Decays
• Hadronic scattering of charmed mesons
• Towards a dynamical understanding of the non-$D\bar{D}$ decay of $\psi (3770)$
• $g_{ND{\Lambda }_c}$ from QCD Sum Rules
• The evasion of helicity selection rule in ${\chi }_{c1}\to VV$ and ${\chi }_{c2}\to VP$ via intermediate charmed meson loops
• Colour Octet Contribution in Exclusive P-Wave Charmonium Decay into Octet and Decuplet Baryons
• K* photoproduction off the nucleon: gamma N --> K* Lambda
• Hadronic loop contributions to $J/\psi$ and ${\psi }^{\prime }$ radiative decays into $\gamma {\eta }_c$ or $\gamma {\eta }_c^{\prime }$
• Implications of light-quark admixtures on charmonium decays into meson pairs
• Charming penguin contributions to B => K π
• Perturbative QCD Forbidden Charmonium Decays and Gluonia
• Exclusive Baryon-Antibaryon Decays of the chi_cJ Mesons
• ${}^1{P}_1$ charmonium state decay into $p\bar{p}$ in QCD models including constituent quark mass corrections
• Associative photoproduction of charmed particles near threshold
• Photoproduction of charmed vector mesons, $\gamma +N\to {\mathcal{B}}_c+\overline{D^{\ast }}$, with ${\mathcal{B}}_c={\Lambda }_c$ or ${\Sigma }_c$

Cited by in corpus (27)

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• Open charm effects in the explanation of the long-standing "$\rho \pi$ puzzle"
• Further understanding of the non-$D\bar{D}$ decays of $\psi (3770)$
• Production of charmed baryon ${\Lambda }_c(2940{)}^{+}$ at PANDA
• Investigating charmonium production at LHC with the p pbar final state
• Open charm effects in $e^{+}{e}^{-}\to J/\psi \eta$, $J/\psi {\pi }^0$ and $\varphi {\eta }_c$
• Measurements of Baryon Pair Decays of ${\chi }_{cJ}$ Mesons
• Updated study of the ${\eta }_c$ and ${\eta }_c^{\prime }$ decays into light vector mesons
• 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
• Measurements of the branching fractions of $\psi (3686)\to {\bar{\Sigma }}^0\Lambda +c.c.$ and ${\chi }_{cJ(J=0,1,2)}\to \Lambda \bar{\Lambda }$
• Search for ${\eta }_c^{\prime }$ decays into vector meson pairs
• Detecting the polarization in ${\chi }_{cJ}\to \varphi \varphi$ decays to probe hadronic loop effect
• Study of the processes ${\chi }_{cJ}\to {\Xi }^{-}{\bar{\Xi }}^{+}$ and ${\Xi }^0{\bar{\Xi }}^0$
• Observation of ${\eta }_c$ decay into ${\Sigma }^{+}{\bar{\Sigma }}^{-}$ and ${\Xi }^{-}{\bar{\Xi }}^{+}$ final states
• First estimate of producing the charmed baryon ${\Lambda }_c(2880)$ at PANDA
• Study on the radiative decays of $h_c$ via intermediate meson loops model
• First Measurements of ${\chi }_{cJ}\to {\Sigma }^{-}{\bar{\Sigma }}^{+}(J=0,1,2)$ Decays
• Improved measurements of ${\chi }_{cJ}\to {\Sigma }^{+}{\bar{\Sigma }}^{-}$ and ${\Sigma }^0{\bar{\Sigma }}^0$ decays
• Evasion of HSR in the charmless decays of excited $P$-wave charmonia
• Combined study of the isospin-violating decay $D_s^{\ast }\to D_s{\pi }^0$ and radiative decay $D_s^{\ast }\to D_s\gamma$ with intermediate meson loops
• Observation of ${\chi }_{cJ}\to 4K_S^0$
• Observation of the decay $h_c\to 3({\pi }^{+}{\pi }^{-}){\pi }^0$
• Search for the isospin-violating decays ${\mathbf{\chi }}_{\mathbf{cJ}}\to \mathbf{\Lambda }{\bar{\mathbf{\Sigma }}}^0+\mathbf{c}.\mathbf{c}.$ and ${\mathbf{\eta }}_{\mathbf{c}}\to \mathbf{\Lambda }{\bar{\mathbf{\Sigma }}}^0+\mathbf{c}.\mathbf{c}.$
• Open charm scenarios
• Helicity amplitude and branching fraction measurement of ${\chi }_{cJ}\to \Lambda \bar{\Lambda }$